/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:20:40,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:20:40,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:20:40,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:20:40,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 13:20:40,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:20:40,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:20:40,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:20:40,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:20:40,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:20:40,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:20:40,130 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:20:40,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:20:40,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:20:40,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:20:40,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:20:40,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:20:40,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:20:40,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:20:40,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:20:40,131 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:20:40,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:20:40,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:20:40,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:20:40,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:20:40,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:20:40,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:20:40,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:20:40,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:20:40,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:20:40,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:20:40,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:20:40,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:20:40,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:20:40,133 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:20:40,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:20:40,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:20:40,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:20:40,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:20:40,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:20:40,502 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:20:40,504 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:20:40,505 INFO L432 ainManager$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 13:20:40,505 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 13:20:40,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:20:40,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:20:40,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:20:40,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:20:40,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:20:40,567 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,575 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:20:40,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:20:40,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:20:40,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:20:40,591 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,591 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,592 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,592 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,597 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,601 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,602 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:20:40,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:20:40,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:20:40,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:20:40,607 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 01:20:40" (1/1) ... [2021-08-21 13:20:40,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:20:40,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:40,642 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 13:20:40,662 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 13:20:40,677 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:20:40,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:20:40,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:20:40,678 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:20:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:20:40,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:20:40,678 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:20:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:20:40,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:20:40,679 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 13:20:40,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:20:40,962 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:20:40,964 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:20:40 BoogieIcfgContainer [2021-08-21 13:20:40,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:20:40,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:20:40,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:20:40,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:20:40,969 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 01:20:40" (1/2) ... [2021-08-21 13:20:40,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5c8d7 and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:20:40, skipping insertion in model container [2021-08-21 13:20:40,970 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 01:20:40" (2/2) ... [2021-08-21 13:20:40,972 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2021-08-21 13:20:40,976 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:20:40,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:20:40,977 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:20:40,977 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:20:41,044 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 13:20:41,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:20:41,100 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 13:20:41,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 13:20:41,112 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2021-08-21 13:20:41,142 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 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 13:20:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 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 13:20:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 13:20:41,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:41,156 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:41,157 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1778097953, now seen corresponding path program 1 times [2021-08-21 13:20:41,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:41,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288112488] [2021-08-21 13:20:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:41,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:41,319 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 13:20:41,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:41,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288112488] [2021-08-21 13:20:41,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288112488] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:20:41,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:20:41,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:20:41,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41881979] [2021-08-21 13:20:41,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:20:41,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:20:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:41,343 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 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) 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 13:20:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:41,392 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-08-21 13:20:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:20:41,394 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 13:20:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:41,409 INFO L225 Difference]: With dead ends: 114 [2021-08-21 13:20:41,409 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 13:20:41,410 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 13:20:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 13:20:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-08-21 13:20:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:20:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-08-21 13:20:41,449 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 16 [2021-08-21 13:20:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:41,450 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-08-21 13:20:41,450 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 13:20:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-08-21 13:20:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:41,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:41,451 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 13:20:41,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:20:41,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash -327311045, now seen corresponding path program 1 times [2021-08-21 13:20:41,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:41,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514502130] [2021-08-21 13:20:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:41,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:41,831 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 13:20:41,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:41,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514502130] [2021-08-21 13:20:41,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514502130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:41,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386451845] [2021-08-21 13:20:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:41,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:41,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:41,837 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 13:20:41,870 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 13:20:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:41,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:42,472 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 13:20:42,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386451845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:42,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:42,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:20:42,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909578710] [2021-08-21 13:20:42,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:20:42,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:20:42,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:20:42,484 INFO L87 Difference]: Start difference. First operand 114 states and 223 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 13:20:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:43,271 INFO L93 Difference]: Finished difference Result 285 states and 537 transitions. [2021-08-21 13:20:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:20:43,272 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 13:20:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:43,274 INFO L225 Difference]: With dead ends: 285 [2021-08-21 13:20:43,274 INFO L226 Difference]: Without dead ends: 278 [2021-08-21 13:20:43,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:20:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-21 13:20:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 153. [2021-08-21 13:20:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.9407894736842106) internal successors, (295), 152 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 13:20:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 295 transitions. [2021-08-21 13:20:43,289 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 295 transitions. Word has length 21 [2021-08-21 13:20:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:43,289 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 295 transitions. [2021-08-21 13:20:43,289 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 13:20:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 295 transitions. [2021-08-21 13:20:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:43,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:43,291 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 13:20:43,315 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 13:20:43,504 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 13:20:43,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash -411096687, now seen corresponding path program 2 times [2021-08-21 13:20:43,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:43,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513685020] [2021-08-21 13:20:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:43,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:43,778 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 13:20:43,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:43,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513685020] [2021-08-21 13:20:43,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513685020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:43,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716664005] [2021-08-21 13:20:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:43,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:43,785 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 13:20:43,791 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 13:20:43,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:43,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 13:20:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:44,405 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 13:20:44,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716664005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:44,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:44,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 13:20:44,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692434142] [2021-08-21 13:20:44,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:44,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:44,408 INFO L87 Difference]: Start difference. First operand 153 states and 295 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:44,966 INFO L93 Difference]: Finished difference Result 261 states and 498 transitions. [2021-08-21 13:20:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:20:44,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:44,968 INFO L225 Difference]: With dead ends: 261 [2021-08-21 13:20:44,968 INFO L226 Difference]: Without dead ends: 250 [2021-08-21 13:20:44,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:20:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-21 13:20:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 157. [2021-08-21 13:20:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9423076923076923) internal successors, (303), 156 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 13:20:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 303 transitions. [2021-08-21 13:20:44,978 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 303 transitions. Word has length 21 [2021-08-21 13:20:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:44,978 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 303 transitions. [2021-08-21 13:20:44,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 303 transitions. [2021-08-21 13:20:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:44,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:44,980 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 13:20:45,006 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 13:20:45,196 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 13:20:45,197 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:45,197 INFO L82 PathProgramCache]: Analyzing trace with hash 470969037, now seen corresponding path program 3 times [2021-08-21 13:20:45,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:45,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538537704] [2021-08-21 13:20:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:45,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:45,448 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 13:20:45,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:45,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538537704] [2021-08-21 13:20:45,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538537704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:45,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782089418] [2021-08-21 13:20:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:20:45,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:45,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:45,455 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 13:20:45,456 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 13:20:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:20:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:45,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:46,036 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 13:20:46,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782089418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:46,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:46,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 13:20:46,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145009171] [2021-08-21 13:20:46,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:20:46,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:20:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:20:46,038 INFO L87 Difference]: Start difference. First operand 157 states and 303 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:46,728 INFO L93 Difference]: Finished difference Result 218 states and 421 transitions. [2021-08-21 13:20:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:20:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 13:20:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:46,736 INFO L225 Difference]: With dead ends: 218 [2021-08-21 13:20:46,736 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 13:20:46,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:20:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 13:20:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 155. [2021-08-21 13:20:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9415584415584415) internal successors, (299), 154 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 13:20:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 299 transitions. [2021-08-21 13:20:46,753 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 299 transitions. Word has length 21 [2021-08-21 13:20:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:46,753 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 299 transitions. [2021-08-21 13:20:46,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 299 transitions. [2021-08-21 13:20:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:46,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:46,757 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 13:20:46,783 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 13:20:46,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:46,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:46,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1099615469, now seen corresponding path program 4 times [2021-08-21 13:20:46,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:46,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636049634] [2021-08-21 13:20:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:46,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:47,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:47,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636049634] [2021-08-21 13:20:47,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636049634] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:20:47,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:20:47,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:20:47,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318764972] [2021-08-21 13:20:47,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:20:47,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:20:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:47,007 INFO L87 Difference]: Start difference. First operand 155 states and 299 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 13:20:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:47,013 INFO L93 Difference]: Finished difference Result 157 states and 301 transitions. [2021-08-21 13:20:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:20:47,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 13:20:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:47,014 INFO L225 Difference]: With dead ends: 157 [2021-08-21 13:20:47,014 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 13:20:47,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 13:20:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-08-21 13:20:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9294871794871795) internal successors, (301), 156 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 13:20:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2021-08-21 13:20:47,019 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 21 [2021-08-21 13:20:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:47,019 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2021-08-21 13:20:47,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 13:20:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2021-08-21 13:20:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:47,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:47,023 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 13:20:47,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 13:20:47,023 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 925568723, now seen corresponding path program 5 times [2021-08-21 13:20:47,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:47,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549847359] [2021-08-21 13:20:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:47,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:47,242 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 13:20:47,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:47,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549847359] [2021-08-21 13:20:47,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549847359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:47,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116041982] [2021-08-21 13:20:47,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:20:47,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:47,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:47,244 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 13:20:47,244 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 13:20:47,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:47,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:47,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:20:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:47,661 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 13:20:47,881 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 13:20:47,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116041982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:47,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:47,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 13:20:47,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976898572] [2021-08-21 13:20:47,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:20:47,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:20:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:20:47,883 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 13:20:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:48,551 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2021-08-21 13:20:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:20:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 13:20:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:48,553 INFO L225 Difference]: With dead ends: 270 [2021-08-21 13:20:48,554 INFO L226 Difference]: Without dead ends: 261 [2021-08-21 13:20:48,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:20:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-21 13:20:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 168. [2021-08-21 13:20:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9401197604790419) internal successors, (324), 167 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 13:20:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 324 transitions. [2021-08-21 13:20:48,560 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 324 transitions. Word has length 21 [2021-08-21 13:20:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:48,560 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 324 transitions. [2021-08-21 13:20:48,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 13:20:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 324 transitions. [2021-08-21 13:20:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:48,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:48,561 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 13:20:48,591 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 13:20:48,784 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 13:20:48,785 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:48,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1018666131, now seen corresponding path program 6 times [2021-08-21 13:20:48,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:48,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137955717] [2021-08-21 13:20:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:48,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:49,064 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 13:20:49,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:49,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137955717] [2021-08-21 13:20:49,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137955717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:49,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333390924] [2021-08-21 13:20:49,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:20:49,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:49,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:49,066 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 13:20:49,067 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 13:20:49,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:20:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:49,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:49,712 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 13:20:49,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333390924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:49,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:49,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 13:20:49,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291810569] [2021-08-21 13:20:49,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:20:49,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:20:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:20:49,715 INFO L87 Difference]: Start difference. First operand 168 states and 324 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 13:20:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:50,094 INFO L93 Difference]: Finished difference Result 266 states and 501 transitions. [2021-08-21 13:20:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:20:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 13:20:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:50,096 INFO L225 Difference]: With dead ends: 266 [2021-08-21 13:20:50,096 INFO L226 Difference]: Without dead ends: 259 [2021-08-21 13:20:50,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:20:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-08-21 13:20:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 167. [2021-08-21 13:20:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9397590361445782) internal successors, (322), 166 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 13:20:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 322 transitions. [2021-08-21 13:20:50,102 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 322 transitions. Word has length 21 [2021-08-21 13:20:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:50,102 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 322 transitions. [2021-08-21 13:20:50,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 13:20:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 322 transitions. [2021-08-21 13:20:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:50,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:50,103 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 13:20:50,120 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 13:20:50,308 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 13:20:50,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash 500372667, now seen corresponding path program 7 times [2021-08-21 13:20:50,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:50,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103378614] [2021-08-21 13:20:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:50,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:50,586 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 13:20:50,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:50,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103378614] [2021-08-21 13:20:50,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103378614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:50,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146119921] [2021-08-21 13:20:50,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:20:50,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:50,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:50,590 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 13:20:50,623 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 13:20:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:51,197 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 13:20:51,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146119921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:51,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:51,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-21 13:20:51,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486654361] [2021-08-21 13:20:51,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:51,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:51,199 INFO L87 Difference]: Start difference. First operand 167 states and 322 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:51,582 INFO L93 Difference]: Finished difference Result 278 states and 521 transitions. [2021-08-21 13:20:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:20:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:51,585 INFO L225 Difference]: With dead ends: 278 [2021-08-21 13:20:51,585 INFO L226 Difference]: Without dead ends: 271 [2021-08-21 13:20:51,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:20:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-21 13:20:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 160. [2021-08-21 13:20:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 159 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 13:20:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 309 transitions. [2021-08-21 13:20:51,594 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 309 transitions. Word has length 21 [2021-08-21 13:20:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:51,595 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 309 transitions. [2021-08-21 13:20:51,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 309 transitions. [2021-08-21 13:20:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:51,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:51,596 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 13:20:51,618 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 13:20:51,808 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 13:20:51,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 585868805, now seen corresponding path program 8 times [2021-08-21 13:20:51,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:51,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044656524] [2021-08-21 13:20:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:51,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:52,061 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 13:20:52,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:52,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044656524] [2021-08-21 13:20:52,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044656524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:52,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101114611] [2021-08-21 13:20:52,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:52,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:52,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:52,063 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 13:20:52,064 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 13:20:52,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:52,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:52,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:52,619 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 13:20:52,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101114611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:52,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:52,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 13:20:52,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946490562] [2021-08-21 13:20:52,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:20:52,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:20:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:20:52,620 INFO L87 Difference]: Start difference. First operand 160 states and 309 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:53,028 INFO L93 Difference]: Finished difference Result 249 states and 468 transitions. [2021-08-21 13:20:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:20:53,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 13:20:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:53,030 INFO L225 Difference]: With dead ends: 249 [2021-08-21 13:20:53,030 INFO L226 Difference]: Without dead ends: 240 [2021-08-21 13:20:53,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:20:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-21 13:20:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-08-21 13:20:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 13:20:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 323 transitions. [2021-08-21 13:20:53,036 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 323 transitions. Word has length 21 [2021-08-21 13:20:53,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:53,036 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 323 transitions. [2021-08-21 13:20:53,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 323 transitions. [2021-08-21 13:20:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:53,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:53,037 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 13:20:53,057 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 13:20:53,244 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 13:20:53,245 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1467934529, now seen corresponding path program 9 times [2021-08-21 13:20:53,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:53,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333817630] [2021-08-21 13:20:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:53,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:53,434 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 13:20:53,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:53,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333817630] [2021-08-21 13:20:53,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333817630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:53,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824664887] [2021-08-21 13:20:53,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:20:53,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:53,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:53,436 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 13:20:53,437 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 13:20:53,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:20:53,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:54,073 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 13:20:54,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824664887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:54,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:54,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 13:20:54,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084717688] [2021-08-21 13:20:54,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:20:54,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:20:54,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:20:54,075 INFO L87 Difference]: Start difference. First operand 167 states and 323 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:54,648 INFO L93 Difference]: Finished difference Result 209 states and 397 transitions. [2021-08-21 13:20:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:20:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 13:20:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:54,653 INFO L225 Difference]: With dead ends: 209 [2021-08-21 13:20:54,653 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 13:20:54,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:20:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 13:20:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2021-08-21 13:20:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.9451219512195121) internal successors, (319), 164 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 13:20:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 319 transitions. [2021-08-21 13:20:54,659 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 319 transitions. Word has length 21 [2021-08-21 13:20:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:54,659 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 319 transitions. [2021-08-21 13:20:54,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 319 transitions. [2021-08-21 13:20:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:54,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:54,660 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 13:20:54,689 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 13:20:54,872 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 13:20:54,873 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1358366049, now seen corresponding path program 10 times [2021-08-21 13:20:54,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:54,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392225581] [2021-08-21 13:20:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:54,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:55,109 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 13:20:55,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:55,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392225581] [2021-08-21 13:20:55,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392225581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:55,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887213526] [2021-08-21 13:20:55,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:20:55,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:55,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:55,112 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 13:20:55,112 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 13:20:55,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:20:55,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:55,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:55,704 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 13:20:55,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887213526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:55,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:55,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 13:20:55,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85164979] [2021-08-21 13:20:55,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:20:55,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:55,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:20:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:20:55,706 INFO L87 Difference]: Start difference. First operand 165 states and 319 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:56,031 INFO L93 Difference]: Finished difference Result 258 states and 486 transitions. [2021-08-21 13:20:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:20:56,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 13:20:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:56,034 INFO L225 Difference]: With dead ends: 258 [2021-08-21 13:20:56,034 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 13:20:56,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:20:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 13:20:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2021-08-21 13:20:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.9447852760736197) internal successors, (317), 163 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 13:20:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 317 transitions. [2021-08-21 13:20:56,041 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 317 transitions. Word has length 21 [2021-08-21 13:20:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:56,042 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 317 transitions. [2021-08-21 13:20:56,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 317 transitions. [2021-08-21 13:20:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:20:56,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:56,043 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 13:20:56,062 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 13:20:56,256 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 13:20:56,257 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash 160672749, now seen corresponding path program 11 times [2021-08-21 13:20:56,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:56,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786709033] [2021-08-21 13:20:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:56,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:56,505 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 13:20:56,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:56,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786709033] [2021-08-21 13:20:56,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786709033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:56,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332293507] [2021-08-21 13:20:56,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:20:56,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:56,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:56,509 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 13:20:56,518 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 13:20:56,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:56,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:20:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:57,203 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 13:20:57,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332293507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:57,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:57,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-21 13:20:57,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113164685] [2021-08-21 13:20:57,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:57,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:57,205 INFO L87 Difference]: Start difference. First operand 164 states and 317 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:57,602 INFO L93 Difference]: Finished difference Result 270 states and 506 transitions. [2021-08-21 13:20:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:20:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:57,605 INFO L225 Difference]: With dead ends: 270 [2021-08-21 13:20:57,605 INFO L226 Difference]: Without dead ends: 263 [2021-08-21 13:20:57,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:20:57,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-21 13:20:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-08-21 13:20:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.934640522875817) internal successors, (296), 153 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 13:20:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 296 transitions. [2021-08-21 13:20:57,612 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 296 transitions. Word has length 21 [2021-08-21 13:20:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:57,612 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 296 transitions. [2021-08-21 13:20:57,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 13:20:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 296 transitions. [2021-08-21 13:20:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 13:20:57,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:57,615 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 13:20:57,642 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 13:20:57,832 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 13:20:57,833 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash -457303751, now seen corresponding path program 1 times [2021-08-21 13:20:57,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:57,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553231415] [2021-08-21 13:20:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:57,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:57,872 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 13:20:57,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:57,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553231415] [2021-08-21 13:20:57,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553231415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:57,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073804136] [2021-08-21 13:20:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:57,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:57,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:57,874 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 13:20:57,875 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 13:20:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:20:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:58,312 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 13:20:58,331 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 13:20:58,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073804136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:58,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:58,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:20:58,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98909626] [2021-08-21 13:20:58,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:20:58,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:20:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:20:58,333 INFO L87 Difference]: Start difference. First operand 154 states and 296 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 13:20:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:58,403 INFO L93 Difference]: Finished difference Result 212 states and 411 transitions. [2021-08-21 13:20:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:20:58,404 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 13:20:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:58,405 INFO L225 Difference]: With dead ends: 212 [2021-08-21 13:20:58,405 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 13:20:58,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:20:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 13:20:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2021-08-21 13:20:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9880239520958083) internal successors, (332), 167 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 13:20:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2021-08-21 13:20:58,410 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 25 [2021-08-21 13:20:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:58,410 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2021-08-21 13:20:58,411 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 13:20:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2021-08-21 13:20:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:58,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:58,411 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 13:20:58,432 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 13:20:58,620 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 13:20:58,621 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1932903841, now seen corresponding path program 12 times [2021-08-21 13:20:58,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:58,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361675531] [2021-08-21 13:20:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:58,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:58,654 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 13:20:58,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:58,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361675531] [2021-08-21 13:20:58,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361675531] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:20:58,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:20:58,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:20:58,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949433402] [2021-08-21 13:20:58,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:20:58,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:20:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:20:58,655 INFO L87 Difference]: Start difference. First operand 168 states and 332 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 13:20:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:58,667 INFO L93 Difference]: Finished difference Result 416 states and 813 transitions. [2021-08-21 13:20:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:20:58,667 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 13:20:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:58,670 INFO L225 Difference]: With dead ends: 416 [2021-08-21 13:20:58,670 INFO L226 Difference]: Without dead ends: 372 [2021-08-21 13:20:58,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:20:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-08-21 13:20:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 330. [2021-08-21 13:20:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.0395136778115504) internal successors, (671), 329 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 13:20:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 671 transitions. [2021-08-21 13:20:58,678 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 671 transitions. Word has length 26 [2021-08-21 13:20:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:58,679 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 671 transitions. [2021-08-21 13:20:58,679 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 13:20:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 671 transitions. [2021-08-21 13:20:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:20:58,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:58,682 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 13:20:58,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 13:20:58,682 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:20:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2125140257, now seen corresponding path program 2 times [2021-08-21 13:20:58,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:58,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435665793] [2021-08-21 13:20:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:58,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:59,161 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 13:20:59,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:59,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435665793] [2021-08-21 13:20:59,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435665793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903184111] [2021-08-21 13:20:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:59,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:59,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:59,163 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 13:20:59,163 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 13:20:59,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:59,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:20:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:59,936 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 13:21:00,418 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 13:21:00,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903184111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:00,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:00,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2021-08-21 13:21:00,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336258321] [2021-08-21 13:21:00,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:21:00,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:00,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:21:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:21:00,420 INFO L87 Difference]: Start difference. First operand 330 states and 671 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:01,597 INFO L93 Difference]: Finished difference Result 496 states and 979 transitions. [2021-08-21 13:21:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:01,600 INFO L225 Difference]: With dead ends: 496 [2021-08-21 13:21:01,600 INFO L226 Difference]: Without dead ends: 489 [2021-08-21 13:21:01,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1113.2ms TimeCoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:21:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-21 13:21:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 355. [2021-08-21 13:21:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0141242937853105) internal successors, (713), 354 states have internal predecessors, (713), 0 states have call successors, (0), 0 states 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 13:21:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 713 transitions. [2021-08-21 13:21:01,610 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 713 transitions. Word has length 30 [2021-08-21 13:21:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:01,610 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 713 transitions. [2021-08-21 13:21:01,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 713 transitions. [2021-08-21 13:21:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:01,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:01,612 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 13:21:01,634 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 13:21:01,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 13:21:01,829 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1190255993, now seen corresponding path program 3 times [2021-08-21 13:21:01,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:01,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793711205] [2021-08-21 13:21:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:01,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:02,262 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 13:21:02,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:02,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793711205] [2021-08-21 13:21:02,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793711205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:02,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871080744] [2021-08-21 13:21:02,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:02,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:02,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:02,264 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 13:21:02,265 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 13:21:02,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:21:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:03,016 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 13:21:03,489 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 13:21:03,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871080744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:03,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:03,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-08-21 13:21:03,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869755729] [2021-08-21 13:21:03,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:21:03,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:03,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:21:03,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:21:03,491 INFO L87 Difference]: Start difference. First operand 355 states and 713 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 13:21:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:04,626 INFO L93 Difference]: Finished difference Result 538 states and 1048 transitions. [2021-08-21 13:21:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:21:04,627 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:04,628 INFO L225 Difference]: With dead ends: 538 [2021-08-21 13:21:04,628 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 13:21:04,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1090.4ms TimeCoverageRelationStatistics Valid=210, Invalid=2142, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:21:04,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 13:21:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 384. [2021-08-21 13:21:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0078328981723237) internal successors, (769), 383 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 13:21:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 769 transitions. [2021-08-21 13:21:04,640 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 769 transitions. Word has length 30 [2021-08-21 13:21:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:04,640 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 769 transitions. [2021-08-21 13:21:04,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 13:21:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 769 transitions. [2021-08-21 13:21:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:04,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:04,641 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 13:21:04,673 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 13:21:04,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 13:21:04,873 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash -308190269, now seen corresponding path program 4 times [2021-08-21 13:21:04,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:04,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135959168] [2021-08-21 13:21:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:04,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:05,333 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 13:21:05,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:05,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135959168] [2021-08-21 13:21:05,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135959168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:05,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106801986] [2021-08-21 13:21:05,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:05,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:05,335 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 13:21:05,336 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 13:21:05,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:05,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:05,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:06,117 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 13:21:06,591 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 13:21:06,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106801986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:06,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:06,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-08-21 13:21:06,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619537569] [2021-08-21 13:21:06,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:21:06,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:21:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:21:06,592 INFO L87 Difference]: Start difference. First operand 384 states and 769 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 13:21:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:08,177 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-08-21 13:21:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:21:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:08,179 INFO L225 Difference]: With dead ends: 458 [2021-08-21 13:21:08,180 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 13:21:08,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1486.4ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:21:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 13:21:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 380. [2021-08-21 13:21:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0079155672823217) internal successors, (761), 379 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 13:21:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 761 transitions. [2021-08-21 13:21:08,189 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 761 transitions. Word has length 30 [2021-08-21 13:21:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:08,189 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 761 transitions. [2021-08-21 13:21:08,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 13:21:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 761 transitions. [2021-08-21 13:21:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:08,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:08,190 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 13:21:08,220 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 13:21:08,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:08,405 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1160476449, now seen corresponding path program 5 times [2021-08-21 13:21:08,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:08,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081416780] [2021-08-21 13:21:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:08,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:08,840 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 13:21:08,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:08,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081416780] [2021-08-21 13:21:08,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081416780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:08,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466049104] [2021-08-21 13:21:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:08,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:08,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:08,841 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 13:21:08,842 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 13:21:09,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:21:09,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:21:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:09,675 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 13:21:10,102 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 13:21:10,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466049104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:10,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:10,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-21 13:21:10,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114009890] [2021-08-21 13:21:10,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:21:10,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:21:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:21:10,104 INFO L87 Difference]: Start difference. First operand 380 states and 761 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 13:21:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:11,144 INFO L93 Difference]: Finished difference Result 557 states and 1087 transitions. [2021-08-21 13:21:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:21:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:11,146 INFO L225 Difference]: With dead ends: 557 [2021-08-21 13:21:11,146 INFO L226 Difference]: Without dead ends: 512 [2021-08-21 13:21:11,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1002.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:21:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-21 13:21:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 368. [2021-08-21 13:21:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.008174386920981) internal successors, (737), 367 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 13:21:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 737 transitions. [2021-08-21 13:21:11,156 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 737 transitions. Word has length 30 [2021-08-21 13:21:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:11,158 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 737 transitions. [2021-08-21 13:21:11,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 13:21:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 737 transitions. [2021-08-21 13:21:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:11,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:11,159 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 13:21:11,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:11,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 13:21:11,386 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash -717883435, now seen corresponding path program 6 times [2021-08-21 13:21:11,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:11,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031879568] [2021-08-21 13:21:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:11,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:11,810 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 13:21:11,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:11,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031879568] [2021-08-21 13:21:11,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031879568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:11,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466631646] [2021-08-21 13:21:11,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:11,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:11,812 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 13:21:11,812 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 13:21:12,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:21:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:12,694 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 13:21:13,203 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 13:21:13,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466631646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:13,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:13,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-08-21 13:21:13,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97502143] [2021-08-21 13:21:13,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:21:13,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:13,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:21:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:21:13,205 INFO L87 Difference]: Start difference. First operand 368 states and 737 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 13:21:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:14,192 INFO L93 Difference]: Finished difference Result 558 states and 1086 transitions. [2021-08-21 13:21:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:14,194 INFO L225 Difference]: With dead ends: 558 [2021-08-21 13:21:14,194 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 13:21:14,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1003.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:21:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 13:21:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 366. [2021-08-21 13:21:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.0082191780821916) internal successors, (733), 365 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 13:21:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 733 transitions. [2021-08-21 13:21:14,203 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 733 transitions. Word has length 30 [2021-08-21 13:21:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:14,203 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 733 transitions. [2021-08-21 13:21:14,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 13:21:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 733 transitions. [2021-08-21 13:21:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:14,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:14,205 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 13:21:14,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 13:21:14,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:14,421 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash 265021255, now seen corresponding path program 7 times [2021-08-21 13:21:14,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:14,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843916075] [2021-08-21 13:21:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:14,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:14,888 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 13:21:14,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:14,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843916075] [2021-08-21 13:21:14,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843916075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:14,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604919928] [2021-08-21 13:21:14,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:21:14,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:14,890 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 13:21:14,890 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 13:21:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:15,863 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 13:21:16,380 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 13:21:16,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604919928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:16,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:16,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-08-21 13:21:16,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368606226] [2021-08-21 13:21:16,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:21:16,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:21:16,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:21:16,382 INFO L87 Difference]: Start difference. First operand 366 states and 733 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 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 13:21:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:17,465 INFO L93 Difference]: Finished difference Result 571 states and 1107 transitions. [2021-08-21 13:21:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:21:17,465 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:17,467 INFO L225 Difference]: With dead ends: 571 [2021-08-21 13:21:17,467 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 13:21:17,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1118.8ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:21:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 13:21:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 364. [2021-08-21 13:21:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 13:21:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-08-21 13:21:17,480 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-08-21 13:21:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:17,480 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-08-21 13:21:17,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 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 13:21:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-08-21 13:21:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:17,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:17,481 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 13:21:17,505 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 13:21:17,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:17,697 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash 103016025, now seen corresponding path program 8 times [2021-08-21 13:21:17,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:17,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095661984] [2021-08-21 13:21:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:17,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:18,127 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 13:21:18,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:18,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095661984] [2021-08-21 13:21:18,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095661984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:18,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258669355] [2021-08-21 13:21:18,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:18,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:18,128 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 13:21:18,129 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 13:21:18,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:18,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:19,181 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 13:21:19,631 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 13:21:19,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258669355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:19,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:19,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-08-21 13:21:19,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115559335] [2021-08-21 13:21:19,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:21:19,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:21:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:21:19,633 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 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 13:21:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:20,625 INFO L93 Difference]: Finished difference Result 511 states and 1006 transitions. [2021-08-21 13:21:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:20,626 INFO L225 Difference]: With dead ends: 511 [2021-08-21 13:21:20,627 INFO L226 Difference]: Without dead ends: 504 [2021-08-21 13:21:20,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1095.4ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:21:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-21 13:21:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 364. [2021-08-21 13:21:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 13:21:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-08-21 13:21:20,635 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-08-21 13:21:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:20,635 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-08-21 13:21:20,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 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 13:21:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-08-21 13:21:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:20,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:20,636 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 13:21:20,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 13:21:20,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:20,852 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash 790273287, now seen corresponding path program 9 times [2021-08-21 13:21:20,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:20,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415133078] [2021-08-21 13:21:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:20,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:21,344 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 13:21:21,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:21,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415133078] [2021-08-21 13:21:21,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415133078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:21,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966359910] [2021-08-21 13:21:21,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:21,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:21,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:21,348 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 13:21:21,349 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 13:21:22,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:21:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:21:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:22,393 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 13:21:22,879 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 13:21:22,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966359910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:22,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:22,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:21:22,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856167192] [2021-08-21 13:21:22,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:21:22,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:21:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:21:22,881 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:24,738 INFO L93 Difference]: Finished difference Result 655 states and 1289 transitions. [2021-08-21 13:21:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:21:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:21:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:24,740 INFO L225 Difference]: With dead ends: 655 [2021-08-21 13:21:24,740 INFO L226 Difference]: Without dead ends: 646 [2021-08-21 13:21:24,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1593.2ms TimeCoverageRelationStatistics Valid=300, Invalid=3240, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:21:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-08-21 13:21:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 386. [2021-08-21 13:21:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.0233766233766235) internal successors, (779), 385 states have internal predecessors, (779), 0 states have call successors, (0), 0 states 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 13:21:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 779 transitions. [2021-08-21 13:21:24,749 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 779 transitions. Word has length 30 [2021-08-21 13:21:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:24,749 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 779 transitions. [2021-08-21 13:21:24,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 779 transitions. [2021-08-21 13:21:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:24,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:24,750 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 13:21:24,773 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 13:21:24,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:24,962 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:24,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:24,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1672339011, now seen corresponding path program 10 times [2021-08-21 13:21:24,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:24,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201826299] [2021-08-21 13:21:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:24,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:25,440 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 13:21:25,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:25,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201826299] [2021-08-21 13:21:25,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201826299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:25,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169957484] [2021-08-21 13:21:25,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:25,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:25,441 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 13:21:25,442 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 13:21:26,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:26,554 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 13:21:26,987 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 13:21:26,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169957484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:26,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:26,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:21:26,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762258429] [2021-08-21 13:21:26,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:21:26,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:21:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:21:26,989 INFO L87 Difference]: Start difference. First operand 386 states and 779 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:29,056 INFO L93 Difference]: Finished difference Result 584 states and 1151 transitions. [2021-08-21 13:21:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:21:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:21:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:29,058 INFO L225 Difference]: With dead ends: 584 [2021-08-21 13:21:29,058 INFO L226 Difference]: Without dead ends: 569 [2021-08-21 13:21:29,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1813.5ms TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:21:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-21 13:21:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 384. [2021-08-21 13:21:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.023498694516971) internal successors, (775), 383 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 13:21:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 775 transitions. [2021-08-21 13:21:29,067 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 775 transitions. Word has length 30 [2021-08-21 13:21:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:29,067 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 775 transitions. [2021-08-21 13:21:29,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 775 transitions. [2021-08-21 13:21:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:29,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:29,068 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 13:21:29,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:29,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 13:21:29,277 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1153961567, now seen corresponding path program 11 times [2021-08-21 13:21:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:29,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640622715] [2021-08-21 13:21:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:29,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:29,746 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 13:21:29,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:29,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640622715] [2021-08-21 13:21:29,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640622715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:29,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733023980] [2021-08-21 13:21:29,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:29,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:29,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:29,753 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 13:21:29,754 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 13:21:30,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:21:30,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:30,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:21:30,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:30,912 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 13:21:31,311 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 13:21:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733023980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:31,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:21:31,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960723013] [2021-08-21 13:21:31,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:21:31,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:21:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:21:31,313 INFO L87 Difference]: Start difference. First operand 384 states and 775 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:21:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:33,251 INFO L93 Difference]: Finished difference Result 713 states and 1395 transitions. [2021-08-21 13:21:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:21:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:21:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:33,253 INFO L225 Difference]: With dead ends: 713 [2021-08-21 13:21:33,253 INFO L226 Difference]: Without dead ends: 696 [2021-08-21 13:21:33,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1603.7ms TimeCoverageRelationStatistics Valid=316, Invalid=3344, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:21:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-08-21 13:21:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 393. [2021-08-21 13:21:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 13:21:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-08-21 13:21:33,262 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-08-21 13:21:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:33,263 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-08-21 13:21:33,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:21:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-08-21 13:21:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:33,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:33,264 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 13:21:33,286 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 13:21:33,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 13:21:33,474 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:33,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:33,474 INFO L82 PathProgramCache]: Analyzing trace with hash 365077231, now seen corresponding path program 12 times [2021-08-21 13:21:33,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:33,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268682903] [2021-08-21 13:21:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:33,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:33,995 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 13:21:33,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:33,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268682903] [2021-08-21 13:21:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268682903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:33,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558938506] [2021-08-21 13:21:33,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:33,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:33,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:33,996 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 13:21:33,998 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 13:21:34,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:21:34,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:21:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:35,184 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 13:21:35,656 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 13:21:35,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558938506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:35,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:35,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:21:35,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61696116] [2021-08-21 13:21:35,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:21:35,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:21:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:21:35,664 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:37,706 INFO L93 Difference]: Finished difference Result 712 states and 1392 transitions. [2021-08-21 13:21:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:21:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:21:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:37,718 INFO L225 Difference]: With dead ends: 712 [2021-08-21 13:21:37,718 INFO L226 Difference]: Without dead ends: 668 [2021-08-21 13:21:37,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1729.9ms TimeCoverageRelationStatistics Valid=331, Invalid=3575, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:21:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-08-21 13:21:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 386. [2021-08-21 13:21:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 13:21:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2021-08-21 13:21:37,727 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2021-08-21 13:21:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:37,727 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2021-08-21 13:21:37,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2021-08-21 13:21:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:37,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:37,728 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 13:21:37,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 13:21:37,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:37,942 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash -265343177, now seen corresponding path program 13 times [2021-08-21 13:21:37,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:37,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260662962] [2021-08-21 13:21:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:37,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:38,406 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 13:21:38,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:38,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260662962] [2021-08-21 13:21:38,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260662962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:38,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981976273] [2021-08-21 13:21:38,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:21:38,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:38,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:38,407 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 13:21:38,408 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 13:21:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:39,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:39,702 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 13:21:40,171 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 13:21:40,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981976273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:40,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:40,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:21:40,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079052403] [2021-08-21 13:21:40,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:21:40,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:21:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:21:40,173 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:41,482 INFO L93 Difference]: Finished difference Result 559 states and 1100 transitions. [2021-08-21 13:21:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:41,482 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:21:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:41,485 INFO L225 Difference]: With dead ends: 559 [2021-08-21 13:21:41,485 INFO L226 Difference]: Without dead ends: 550 [2021-08-21 13:21:41,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1256.2ms TimeCoverageRelationStatistics Valid=235, Invalid=2417, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:21:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-21 13:21:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 388. [2021-08-21 13:21:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0025839793281652) internal successors, (775), 387 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 13:21:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 775 transitions. [2021-08-21 13:21:41,493 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 775 transitions. Word has length 30 [2021-08-21 13:21:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:41,494 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 775 transitions. [2021-08-21 13:21:41,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 775 transitions. [2021-08-21 13:21:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:41,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:41,495 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 13:21:41,520 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 13:21:41,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:41,720 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash 616722547, now seen corresponding path program 14 times [2021-08-21 13:21:41,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:41,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866277335] [2021-08-21 13:21:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:41,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:42,223 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 13:21:42,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:42,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866277335] [2021-08-21 13:21:42,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866277335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:42,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996237040] [2021-08-21 13:21:42,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:42,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:42,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:42,232 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 13:21:42,236 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 13:21:43,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:43,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:43,564 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 13:21:44,016 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 13:21:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996237040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:44,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:44,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:21:44,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640835434] [2021-08-21 13:21:44,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:21:44,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:21:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:21:44,018 INFO L87 Difference]: Start difference. First operand 388 states and 775 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:45,512 INFO L93 Difference]: Finished difference Result 487 states and 964 transitions. [2021-08-21 13:21:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:21:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:45,514 INFO L225 Difference]: With dead ends: 487 [2021-08-21 13:21:45,514 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 13:21:45,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1486.7ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:21:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 13:21:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 378. [2021-08-21 13:21:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0159151193633953) internal successors, (760), 377 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 13:21:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 760 transitions. [2021-08-21 13:21:45,523 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 760 transitions. Word has length 30 [2021-08-21 13:21:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:45,523 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 760 transitions. [2021-08-21 13:21:45,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 760 transitions. [2021-08-21 13:21:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:45,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:45,524 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 13:21:45,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 13:21:45,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 13:21:45,737 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:45,737 INFO L82 PathProgramCache]: Analyzing trace with hash -261285103, now seen corresponding path program 15 times [2021-08-21 13:21:45,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:45,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154618203] [2021-08-21 13:21:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:45,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:46,134 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 13:21:46,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:46,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154618203] [2021-08-21 13:21:46,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154618203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:46,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953785207] [2021-08-21 13:21:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:46,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:46,135 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 13:21:46,135 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 13:21:47,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:21:47,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:47,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:47,454 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 13:21:47,998 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 13:21:47,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953785207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:47,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:47,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-08-21 13:21:47,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929031625] [2021-08-21 13:21:47,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:21:47,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:21:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:21:48,000 INFO L87 Difference]: Start difference. First operand 378 states and 760 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:49,208 INFO L93 Difference]: Finished difference Result 568 states and 1127 transitions. [2021-08-21 13:21:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:21:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:49,210 INFO L225 Difference]: With dead ends: 568 [2021-08-21 13:21:49,210 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 13:21:49,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1136.8ms TimeCoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:21:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 13:21:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 376. [2021-08-21 13:21:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.018666666666667) internal successors, (757), 375 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 13:21:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 757 transitions. [2021-08-21 13:21:49,217 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 757 transitions. Word has length 30 [2021-08-21 13:21:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:49,217 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 757 transitions. [2021-08-21 13:21:49,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 757 transitions. [2021-08-21 13:21:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:49,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:49,218 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 13:21:49,257 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 13:21:49,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 13:21:49,441 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash 224852401, now seen corresponding path program 16 times [2021-08-21 13:21:49,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:49,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986184255] [2021-08-21 13:21:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:49,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:49,940 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 13:21:49,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:49,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986184255] [2021-08-21 13:21:49,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986184255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:49,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431436598] [2021-08-21 13:21:49,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:49,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:49,962 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 13:21:49,963 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 13:21:51,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:51,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:51,370 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 13:21:51,814 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 13:21:51,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431436598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:51,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:51,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:21:51,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280754512] [2021-08-21 13:21:51,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:21:51,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:51,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:21:51,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:21:51,815 INFO L87 Difference]: Start difference. First operand 376 states and 757 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:53,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:53,123 INFO L93 Difference]: Finished difference Result 547 states and 1076 transitions. [2021-08-21 13:21:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:21:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:53,126 INFO L225 Difference]: With dead ends: 547 [2021-08-21 13:21:53,126 INFO L226 Difference]: Without dead ends: 538 [2021-08-21 13:21:53,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1239.3ms TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:21:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-21 13:21:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 391. [2021-08-21 13:21:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 13:21:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-08-21 13:21:53,134 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-08-21 13:21:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:53,135 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-08-21 13:21:53,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-08-21 13:21:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:53,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:53,136 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 13:21:53,167 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 13:21:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 13:21:53,361 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:53,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1106918125, now seen corresponding path program 17 times [2021-08-21 13:21:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:53,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90741336] [2021-08-21 13:21:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:53,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:53,812 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 13:21:53,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:53,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90741336] [2021-08-21 13:21:53,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90741336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:53,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405108390] [2021-08-21 13:21:53,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:53,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:53,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:53,813 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 13:21:53,814 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 13:21:54,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:55,281 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 13:21:55,736 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 13:21:55,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405108390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:55,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:55,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:21:55,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632918423] [2021-08-21 13:21:55,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:21:55,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:21:55,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:21:55,738 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:57,240 INFO L93 Difference]: Finished difference Result 498 states and 987 transitions. [2021-08-21 13:21:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:21:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:21:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:57,243 INFO L225 Difference]: With dead ends: 498 [2021-08-21 13:21:57,243 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 13:21:57,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1448.2ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:21:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 13:21:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 389. [2021-08-21 13:21:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.015463917525773) internal successors, (782), 388 states have internal predecessors, (782), 0 states have call successors, (0), 0 states 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 13:21:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 782 transitions. [2021-08-21 13:21:57,250 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 782 transitions. Word has length 30 [2021-08-21 13:21:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:57,250 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 782 transitions. [2021-08-21 13:21:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:21:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 782 transitions. [2021-08-21 13:21:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:21:57,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:57,251 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 13:21:57,283 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 13:21:57,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:57,477 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:21:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1719382453, now seen corresponding path program 18 times [2021-08-21 13:21:57,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:57,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618378362] [2021-08-21 13:21:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:57,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:57,923 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 13:21:57,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:57,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618378362] [2021-08-21 13:21:57,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618378362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:57,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700169306] [2021-08-21 13:21:57,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:57,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:57,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:57,924 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 13:21:57,926 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 13:21:59,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:21:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:59,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:59,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:59,417 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 13:21:59,832 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 13:21:59,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700169306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:59,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:59,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:21:59,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088140504] [2021-08-21 13:21:59,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:21:59,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:21:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:21:59,834 INFO L87 Difference]: Start difference. First operand 389 states and 782 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:22:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:01,144 INFO L93 Difference]: Finished difference Result 558 states and 1104 transitions. [2021-08-21 13:22:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:22:01,144 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:22:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:01,146 INFO L225 Difference]: With dead ends: 558 [2021-08-21 13:22:01,146 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 13:22:01,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1141.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:22:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 13:22:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 381. [2021-08-21 13:22:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 13:22:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-08-21 13:22:01,152 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-08-21 13:22:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-08-21 13:22:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:22:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-08-21 13:22:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:01,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:01,153 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 13:22:01,182 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 13:22:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:01,377 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash 228910475, now seen corresponding path program 19 times [2021-08-21 13:22:01,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:01,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300896420] [2021-08-21 13:22:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:01,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:01,773 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 13:22:01,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:01,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300896420] [2021-08-21 13:22:01,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300896420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:01,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130739262] [2021-08-21 13:22:01,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:01,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:01,775 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 13:22:01,776 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 13:22:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:03,331 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 13:22:03,856 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 13:22:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130739262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:03,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-08-21 13:22:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385935548] [2021-08-21 13:22:03,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:22:03,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:22:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:03,857 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:04,911 INFO L93 Difference]: Finished difference Result 541 states and 1073 transitions. [2021-08-21 13:22:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:22:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:22:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:04,914 INFO L225 Difference]: With dead ends: 541 [2021-08-21 13:22:04,914 INFO L226 Difference]: Without dead ends: 508 [2021-08-21 13:22:04,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1074.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:22:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-08-21 13:22:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 379. [2021-08-21 13:22:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.015873015873016) internal successors, (762), 378 states have internal predecessors, (762), 0 states have call successors, (0), 0 states 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 13:22:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 762 transitions. [2021-08-21 13:22:04,922 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 762 transitions. Word has length 30 [2021-08-21 13:22:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:04,923 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 762 transitions. [2021-08-21 13:22:04,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 762 transitions. [2021-08-21 13:22:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:04,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:04,924 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 13:22:04,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:05,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:05,137 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2110598265, now seen corresponding path program 20 times [2021-08-21 13:22:05,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:05,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115558974] [2021-08-21 13:22:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:05,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:05,574 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 13:22:05,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:05,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115558974] [2021-08-21 13:22:05,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115558974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:05,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569513022] [2021-08-21 13:22:05,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:05,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:05,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:05,579 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 13:22:05,580 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 13:22:06,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:06,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:07,211 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 13:22:07,754 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 13:22:07,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569513022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:07,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:07,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 13:22:07,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267407485] [2021-08-21 13:22:07,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:07,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:07,755 INFO L87 Difference]: Start difference. First operand 379 states and 762 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:08,914 INFO L93 Difference]: Finished difference Result 542 states and 1074 transitions. [2021-08-21 13:22:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:22:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:22:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:08,916 INFO L225 Difference]: With dead ends: 542 [2021-08-21 13:22:08,916 INFO L226 Difference]: Without dead ends: 506 [2021-08-21 13:22:08,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1126.9ms TimeCoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:22:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-21 13:22:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 377. [2021-08-21 13:22:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states 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 13:22:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-08-21 13:22:08,923 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-08-21 13:22:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:08,923 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-08-21 13:22:08,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-08-21 13:22:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:08,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:08,924 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 13:22:08,951 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 13:22:09,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 13:22:09,145 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1453752901, now seen corresponding path program 21 times [2021-08-21 13:22:09,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:09,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375777733] [2021-08-21 13:22:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:09,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:09,583 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 13:22:09,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:09,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375777733] [2021-08-21 13:22:09,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375777733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:09,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208387024] [2021-08-21 13:22:09,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:09,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:09,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:09,585 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 13:22:09,586 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 13:22:10,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:22:10,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:11,314 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 13:22:11,707 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 13:22:11,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208387024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:11,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:11,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:22:11,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689923829] [2021-08-21 13:22:11,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:11,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:11,709 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:13,083 INFO L93 Difference]: Finished difference Result 569 states and 1111 transitions. [2021-08-21 13:22:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:22:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:22:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:13,085 INFO L225 Difference]: With dead ends: 569 [2021-08-21 13:22:13,085 INFO L226 Difference]: Without dead ends: 560 [2021-08-21 13:22:13,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1280.8ms TimeCoverageRelationStatistics Valid=252, Invalid=2610, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:22:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-21 13:22:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 406. [2021-08-21 13:22:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states 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 13:22:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-08-21 13:22:13,092 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-08-21 13:22:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:13,092 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-08-21 13:22:13,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-08-21 13:22:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:13,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:13,094 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 13:22:13,116 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 13:22:13,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:13,303 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash -571687177, now seen corresponding path program 22 times [2021-08-21 13:22:13,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:13,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602459097] [2021-08-21 13:22:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:13,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:13,767 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 13:22:13,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:13,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602459097] [2021-08-21 13:22:13,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602459097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:13,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100685900] [2021-08-21 13:22:13,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:13,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:13,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:13,769 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 13:22:13,769 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 13:22:15,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:15,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:15,543 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 13:22:16,008 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 13:22:16,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100685900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:16,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:16,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:22:16,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419258469] [2021-08-21 13:22:16,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:16,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:16,010 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:17,921 INFO L93 Difference]: Finished difference Result 487 states and 955 transitions. [2021-08-21 13:22:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:22:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:22:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:17,923 INFO L225 Difference]: With dead ends: 487 [2021-08-21 13:22:17,923 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 13:22:17,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1726.1ms TimeCoverageRelationStatistics Valid=310, Invalid=2996, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:22:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 13:22:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 402. [2021-08-21 13:22:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 13:22:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-08-21 13:22:17,929 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-08-21 13:22:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:17,929 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-08-21 13:22:17,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-08-21 13:22:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:17,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:17,931 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 13:22:17,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:18,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:18,154 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash 896979541, now seen corresponding path program 23 times [2021-08-21 13:22:18,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:18,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659619546] [2021-08-21 13:22:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:18,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:18,598 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 13:22:18,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:18,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659619546] [2021-08-21 13:22:18,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659619546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:18,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716757178] [2021-08-21 13:22:18,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:18,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:18,599 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 13:22:18,601 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 13:22:20,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:20,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:22:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:20,397 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 13:22:20,768 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 13:22:20,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716757178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:20,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:20,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:22:20,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921185030] [2021-08-21 13:22:20,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:22:20,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:22:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:20,769 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:22:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:22,036 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-08-21 13:22:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:22:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:22:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:22,038 INFO L225 Difference]: With dead ends: 588 [2021-08-21 13:22:22,038 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 13:22:22,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1240.8ms TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:22:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 13:22:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 389. [2021-08-21 13:22:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0128865979381443) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 13:22:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 781 transitions. [2021-08-21 13:22:22,046 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 781 transitions. Word has length 30 [2021-08-21 13:22:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:22,046 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 781 transitions. [2021-08-21 13:22:22,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:22:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 781 transitions. [2021-08-21 13:22:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:22,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:22,048 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 13:22:22,069 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 13:22:22,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 13:22:22,257 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1449694827, now seen corresponding path program 24 times [2021-08-21 13:22:22,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:22,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076476669] [2021-08-21 13:22:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:22,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:22,658 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 13:22:22,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:22,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076476669] [2021-08-21 13:22:22,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076476669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:22,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162267469] [2021-08-21 13:22:22,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:22:22,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:22,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:22,659 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 13:22:22,660 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 13:22:24,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:22:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:24,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:22:24,981 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 13:22:24,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162267469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:24,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:24,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-08-21 13:22:24,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523488705] [2021-08-21 13:22:24,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:22:24,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:22:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:24,983 INFO L87 Difference]: Start difference. First operand 389 states and 781 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:26,063 INFO L93 Difference]: Finished difference Result 589 states and 1149 transitions. [2021-08-21 13:22:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:22:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:22:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:26,065 INFO L225 Difference]: With dead ends: 589 [2021-08-21 13:22:26,065 INFO L226 Difference]: Without dead ends: 556 [2021-08-21 13:22:26,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1060.0ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:22:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-21 13:22:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 386. [2021-08-21 13:22:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.012987012987013) internal successors, (775), 385 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 13:22:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 775 transitions. [2021-08-21 13:22:26,072 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 775 transitions. Word has length 30 [2021-08-21 13:22:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:26,072 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 775 transitions. [2021-08-21 13:22:26,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:26,072 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 775 transitions. [2021-08-21 13:22:26,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:26,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:26,073 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 13:22:26,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 13:22:26,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 13:22:26,274 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 505763729, now seen corresponding path program 25 times [2021-08-21 13:22:26,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:26,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464035468] [2021-08-21 13:22:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:26,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:26,680 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 13:22:26,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:26,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464035468] [2021-08-21 13:22:26,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464035468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:26,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300394763] [2021-08-21 13:22:26,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:26,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:26,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:26,683 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 13:22:26,684 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 13:22:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:28,584 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 13:22:29,087 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 13:22:29,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300394763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:29,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:29,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 13:22:29,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505083904] [2021-08-21 13:22:29,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:29,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:29,089 INFO L87 Difference]: Start difference. First operand 386 states and 775 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:30,355 INFO L93 Difference]: Finished difference Result 602 states and 1170 transitions. [2021-08-21 13:22:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:22:30,355 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:22:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:30,357 INFO L225 Difference]: With dead ends: 602 [2021-08-21 13:22:30,357 INFO L226 Difference]: Without dead ends: 566 [2021-08-21 13:22:30,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1170.1ms TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:22:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-21 13:22:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 383. [2021-08-21 13:22:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0157068062827226) internal successors, (770), 382 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 13:22:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 770 transitions. [2021-08-21 13:22:30,364 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 770 transitions. Word has length 30 [2021-08-21 13:22:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:30,364 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 770 transitions. [2021-08-21 13:22:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 770 transitions. [2021-08-21 13:22:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:30,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:30,365 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 13:22:30,392 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 13:22:30,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 13:22:30,579 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 22360469, now seen corresponding path program 26 times [2021-08-21 13:22:30,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:30,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612924630] [2021-08-21 13:22:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:30,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:31,143 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 13:22:31,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:31,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612924630] [2021-08-21 13:22:31,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612924630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:31,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092610513] [2021-08-21 13:22:31,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:31,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:31,149 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 13:22:31,176 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 13:22:32,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:32,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:33,183 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 13:22:33,672 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 13:22:33,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092610513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:33,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:33,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-08-21 13:22:33,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283185674] [2021-08-21 13:22:33,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:22:33,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:22:33,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:22:33,674 INFO L87 Difference]: Start difference. First operand 383 states and 770 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:34,926 INFO L93 Difference]: Finished difference Result 536 states and 1058 transitions. [2021-08-21 13:22:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:22:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:22:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:34,928 INFO L225 Difference]: With dead ends: 536 [2021-08-21 13:22:34,928 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 13:22:34,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1338.0ms TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:22:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 13:22:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 377. [2021-08-21 13:22:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states 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 13:22:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-08-21 13:22:34,936 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-08-21 13:22:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:34,936 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-08-21 13:22:34,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-08-21 13:22:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:34,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:34,937 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 13:22:34,958 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 13:22:35,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 13:22:35,141 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash 630707147, now seen corresponding path program 27 times [2021-08-21 13:22:35,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:35,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004687208] [2021-08-21 13:22:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:35,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:35,575 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 13:22:35,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:35,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004687208] [2021-08-21 13:22:35,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004687208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:35,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99974144] [2021-08-21 13:22:35,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:35,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:35,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:35,576 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 13:22:35,577 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 13:22:37,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:22:37,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:37,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:22:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:37,570 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 13:22:38,119 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 13:22:38,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99974144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:38,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:38,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:22:38,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192955119] [2021-08-21 13:22:38,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:38,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:38,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:38,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:38,121 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:39,305 INFO L93 Difference]: Finished difference Result 544 states and 1071 transitions. [2021-08-21 13:22:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:22:39,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:22:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:39,306 INFO L225 Difference]: With dead ends: 544 [2021-08-21 13:22:39,306 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 13:22:39,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:22:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 13:22:39,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 394. [2021-08-21 13:22:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.015267175572519) internal successors, (792), 393 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 13:22:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 792 transitions. [2021-08-21 13:22:39,312 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 792 transitions. Word has length 30 [2021-08-21 13:22:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:39,312 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 792 transitions. [2021-08-21 13:22:39,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 792 transitions. [2021-08-21 13:22:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:39,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:39,313 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 13:22:39,334 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 13:22:39,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 13:22:39,514 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:39,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1512772871, now seen corresponding path program 28 times [2021-08-21 13:22:39,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:39,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304912466] [2021-08-21 13:22:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:39,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:39,954 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 13:22:39,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304912466] [2021-08-21 13:22:39,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304912466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809645500] [2021-08-21 13:22:39,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:39,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:39,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:39,955 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 13:22:39,956 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 13:22:41,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:41,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:41,970 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 13:22:42,444 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 13:22:42,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809645500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:42,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:42,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:22:42,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632766827] [2021-08-21 13:22:42,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:42,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:42,445 INFO L87 Difference]: Start difference. First operand 394 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:43,818 INFO L93 Difference]: Finished difference Result 488 states and 972 transitions. [2021-08-21 13:22:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:22:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:22:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:43,821 INFO L225 Difference]: With dead ends: 488 [2021-08-21 13:22:43,821 INFO L226 Difference]: Without dead ends: 473 [2021-08-21 13:22:43,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1438.2ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:22:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-08-21 13:22:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 392. [2021-08-21 13:22:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0153452685421995) internal successors, (788), 391 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 13:22:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 788 transitions. [2021-08-21 13:22:43,828 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 788 transitions. Word has length 30 [2021-08-21 13:22:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:43,828 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 788 transitions. [2021-08-21 13:22:43,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 788 transitions. [2021-08-21 13:22:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:43,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:43,829 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 13:22:43,853 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 13:22:44,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 13:22:44,041 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1313527707, now seen corresponding path program 29 times [2021-08-21 13:22:44,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:44,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249443182] [2021-08-21 13:22:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:44,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:44,537 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 13:22:44,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:44,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249443182] [2021-08-21 13:22:44,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249443182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:44,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38641804] [2021-08-21 13:22:44,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:44,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:44,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:44,539 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 13:22:44,540 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 13:22:46,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:22:46,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:22:46,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:46,668 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 13:22:47,090 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 13:22:47,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38641804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:47,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:47,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:22:47,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120604251] [2021-08-21 13:22:47,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:22:47,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:22:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:47,091 INFO L87 Difference]: Start difference. First operand 392 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:22:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:48,216 INFO L93 Difference]: Finished difference Result 537 states and 1061 transitions. [2021-08-21 13:22:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:22:48,216 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:22:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:48,218 INFO L225 Difference]: With dead ends: 537 [2021-08-21 13:22:48,218 INFO L226 Difference]: Without dead ends: 520 [2021-08-21 13:22:48,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1230.8ms TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:22:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-21 13:22:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 391. [2021-08-21 13:22:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 13:22:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-08-21 13:22:48,223 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-08-21 13:22:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:48,224 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-08-21 13:22:48,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:22:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-08-21 13:22:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:48,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:48,224 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 13:22:48,246 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 13:22:48,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 13:22:48,425 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash 205511091, now seen corresponding path program 30 times [2021-08-21 13:22:48,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:48,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38053170] [2021-08-21 13:22:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:48,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:48,875 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 13:22:48,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:48,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38053170] [2021-08-21 13:22:48,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38053170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:48,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634350270] [2021-08-21 13:22:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:22:48,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:48,876 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 13:22:48,877 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 13:22:50,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:22:50,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:22:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:51,004 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 13:22:51,466 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 13:22:51,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634350270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:51,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:51,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:22:51,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093160014] [2021-08-21 13:22:51,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:51,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:51,467 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:52,598 INFO L93 Difference]: Finished difference Result 539 states and 1064 transitions. [2021-08-21 13:22:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:22:52,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:22:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:52,600 INFO L225 Difference]: With dead ends: 539 [2021-08-21 13:22:52,600 INFO L226 Difference]: Without dead ends: 498 [2021-08-21 13:22:52,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1236.7ms TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:22:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-21 13:22:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 381. [2021-08-21 13:22:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 13:22:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-08-21 13:22:52,605 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-08-21 13:22:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:52,605 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-08-21 13:22:52,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-08-21 13:22:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:52,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:52,606 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 13:22:52,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 13:22:52,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 13:22:52,809 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1666851087, now seen corresponding path program 31 times [2021-08-21 13:22:52,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:52,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289119712] [2021-08-21 13:22:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:52,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:53,304 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 13:22:53,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:53,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289119712] [2021-08-21 13:22:53,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289119712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:53,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151377921] [2021-08-21 13:22:53,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:53,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:53,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:53,305 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 13:22:53,306 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 13:22:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:55,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:55,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:22:55,932 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 13:22:55,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151377921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:55,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:55,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:22:55,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71414880] [2021-08-21 13:22:55,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:22:55,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:55,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:22:55,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:55,934 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:57,343 INFO L93 Difference]: Finished difference Result 570 states and 1119 transitions. [2021-08-21 13:22:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:22:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:22:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:57,345 INFO L225 Difference]: With dead ends: 570 [2021-08-21 13:22:57,345 INFO L226 Difference]: Without dead ends: 561 [2021-08-21 13:22:57,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1433.3ms TimeCoverageRelationStatistics Valid=274, Invalid=2918, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:22:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-21 13:22:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 395. [2021-08-21 13:22:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.017766497461929) internal successors, (795), 394 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 13:22:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 795 transitions. [2021-08-21 13:22:57,352 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 795 transitions. Word has length 30 [2021-08-21 13:22:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:57,352 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 795 transitions. [2021-08-21 13:22:57,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:22:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 795 transitions. [2021-08-21 13:22:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:22:57,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:57,353 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 13:22:57,376 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 13:22:57,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:57,553 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:22:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash -784785363, now seen corresponding path program 32 times [2021-08-21 13:22:57,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:57,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483326622] [2021-08-21 13:22:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:57,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:58,056 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 13:22:58,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:58,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483326622] [2021-08-21 13:22:58,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483326622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:58,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626137739] [2021-08-21 13:22:58,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:58,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:58,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:58,057 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 13:22:58,057 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 13:23:00,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:00,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:00,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:00,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:00,290 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 13:23:00,871 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 13:23:00,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626137739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:00,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:00,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 13:23:00,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504788128] [2021-08-21 13:23:00,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:23:00,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:00,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:23:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:23:00,873 INFO L87 Difference]: Start difference. First operand 395 states and 795 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:23:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:02,645 INFO L93 Difference]: Finished difference Result 555 states and 1101 transitions. [2021-08-21 13:23:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:23:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:23:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:02,651 INFO L225 Difference]: With dead ends: 555 [2021-08-21 13:23:02,651 INFO L226 Difference]: Without dead ends: 540 [2021-08-21 13:23:02,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1713.0ms TimeCoverageRelationStatistics Valid=355, Invalid=3427, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:23:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-08-21 13:23:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 393. [2021-08-21 13:23:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 13:23:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-08-21 13:23:02,656 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-08-21 13:23:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:02,656 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-08-21 13:23:02,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:23:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-08-21 13:23:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:02,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:02,657 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 13:23:02,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:02,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:02,858 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:02,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:02,858 INFO L82 PathProgramCache]: Analyzing trace with hash 683881355, now seen corresponding path program 33 times [2021-08-21 13:23:02,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:02,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451168077] [2021-08-21 13:23:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:02,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:03,351 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 13:23:03,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:03,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451168077] [2021-08-21 13:23:03,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451168077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:03,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595978336] [2021-08-21 13:23:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:23:03,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:03,353 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 13:23:03,354 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 13:23:05,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:23:05,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:05,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:23:05,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:05,616 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 13:23:06,030 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 13:23:06,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595978336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:06,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:06,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:23:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354058346] [2021-08-21 13:23:06,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:23:06,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:23:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:23:06,032 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:23:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:07,630 INFO L93 Difference]: Finished difference Result 576 states and 1136 transitions. [2021-08-21 13:23:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:23:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:23:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:07,632 INFO L225 Difference]: With dead ends: 576 [2021-08-21 13:23:07,632 INFO L226 Difference]: Without dead ends: 559 [2021-08-21 13:23:07,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1529.7ms TimeCoverageRelationStatistics Valid=290, Invalid=3016, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:23:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-21 13:23:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 402. [2021-08-21 13:23:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 13:23:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-08-21 13:23:07,640 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-08-21 13:23:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:07,641 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-08-21 13:23:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:23:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-08-21 13:23:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:07,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:07,641 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 13:23:07,669 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 13:23:07,856 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,SelfDestructingSolverStorable45 [2021-08-21 13:23:07,857 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2092047143, now seen corresponding path program 34 times [2021-08-21 13:23:07,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:07,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347189942] [2021-08-21 13:23:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:07,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:08,387 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 13:23:08,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:08,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347189942] [2021-08-21 13:23:08,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347189942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:08,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096582062] [2021-08-21 13:23:08,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:23:08,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:08,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:08,389 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 13:23:08,390 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 13:23:10,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:23:10,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:10,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:10,749 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 13:23:11,210 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 13:23:11,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096582062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:11,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:11,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:23:11,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527405312] [2021-08-21 13:23:11,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:23:11,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:23:11,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:23:11,211 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:12,769 INFO L93 Difference]: Finished difference Result 575 states and 1133 transitions. [2021-08-21 13:23:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:23:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:23:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:12,771 INFO L225 Difference]: With dead ends: 575 [2021-08-21 13:23:12,772 INFO L226 Difference]: Without dead ends: 531 [2021-08-21 13:23:12,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1555.7ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:23:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-08-21 13:23:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 392. [2021-08-21 13:23:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 13:23:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2021-08-21 13:23:12,779 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2021-08-21 13:23:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:12,779 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2021-08-21 13:23:12,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2021-08-21 13:23:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:12,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:12,780 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 13:23:12,804 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 13:23:12,980 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,SelfDestructingSolverStorable46 [2021-08-21 13:23:12,981 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:12,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1572499745, now seen corresponding path program 35 times [2021-08-21 13:23:12,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:12,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110264329] [2021-08-21 13:23:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:12,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:13,428 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 13:23:13,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:13,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110264329] [2021-08-21 13:23:13,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110264329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:13,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536236865] [2021-08-21 13:23:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:23:13,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:13,429 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 13:23:13,430 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 13:23:15,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:15,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:15,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:15,805 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 13:23:16,265 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 13:23:16,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536236865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:16,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:16,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:23:16,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644012832] [2021-08-21 13:23:16,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:23:16,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:23:16,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:23:16,267 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:17,325 INFO L93 Difference]: Finished difference Result 516 states and 1009 transitions. [2021-08-21 13:23:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:23:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:23:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:17,327 INFO L225 Difference]: With dead ends: 516 [2021-08-21 13:23:17,327 INFO L226 Difference]: Without dead ends: 507 [2021-08-21 13:23:17,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1123.2ms TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:23:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-21 13:23:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 394. [2021-08-21 13:23:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0) internal successors, (786), 393 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 13:23:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 786 transitions. [2021-08-21 13:23:17,333 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 786 transitions. Word has length 30 [2021-08-21 13:23:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:17,333 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 786 transitions. [2021-08-21 13:23:17,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 786 transitions. [2021-08-21 13:23:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:17,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:17,334 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 13:23:17,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 13:23:17,534 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,SelfDestructingSolverStorable47 [2021-08-21 13:23:17,535 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1840401827, now seen corresponding path program 36 times [2021-08-21 13:23:17,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:17,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387094528] [2021-08-21 13:23:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:17,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:18,048 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 13:23:18,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:18,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387094528] [2021-08-21 13:23:18,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387094528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:18,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449855266] [2021-08-21 13:23:18,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:23:18,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:18,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:18,049 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 13:23:18,075 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 13:23:20,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:23:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:20,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:23:20,980 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 13:23:20,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449855266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:20,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:20,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:23:20,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299350144] [2021-08-21 13:23:20,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:23:20,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:23:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:23:20,981 INFO L87 Difference]: Start difference. First operand 394 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:22,208 INFO L93 Difference]: Finished difference Result 448 states and 885 transitions. [2021-08-21 13:23:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:23:22,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:23:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:22,210 INFO L225 Difference]: With dead ends: 448 [2021-08-21 13:23:22,210 INFO L226 Difference]: Without dead ends: 425 [2021-08-21 13:23:22,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1346.2ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:23:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-08-21 13:23:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 384. [2021-08-21 13:23:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0130548302872064) internal successors, (771), 383 states have internal predecessors, (771), 0 states have call successors, (0), 0 states 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 13:23:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 771 transitions. [2021-08-21 13:23:22,216 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 771 transitions. Word has length 30 [2021-08-21 13:23:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:22,217 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 771 transitions. [2021-08-21 13:23:22,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 771 transitions. [2021-08-21 13:23:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:22,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:22,218 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 13:23:22,242 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 13:23:22,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:22,425 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1576557819, now seen corresponding path program 37 times [2021-08-21 13:23:22,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:22,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142530627] [2021-08-21 13:23:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:22,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:22,859 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 13:23:22,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:22,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142530627] [2021-08-21 13:23:22,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142530627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:22,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683584551] [2021-08-21 13:23:22,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:23:22,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:22,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:22,860 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 13:23:22,861 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 13:23:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:25,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:25,303 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 13:23:25,827 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 13:23:25,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683584551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:25,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:25,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-08-21 13:23:25,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493746423] [2021-08-21 13:23:25,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:23:25,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:23:25,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:23:25,829 INFO L87 Difference]: Start difference. First operand 384 states and 771 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 13:23:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:26,846 INFO L93 Difference]: Finished difference Result 518 states and 1023 transitions. [2021-08-21 13:23:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:23:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 30 [2021-08-21 13:23:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:26,847 INFO L225 Difference]: With dead ends: 518 [2021-08-21 13:23:26,848 INFO L226 Difference]: Without dead ends: 485 [2021-08-21 13:23:26,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1093.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:23:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-21 13:23:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 381. [2021-08-21 13:23:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 13:23:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-08-21 13:23:26,854 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-08-21 13:23:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:26,854 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-08-21 13:23:26,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 13:23:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-08-21 13:23:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:26,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:26,855 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 13:23:26,884 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 13:23:27,076 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,SelfDestructingSolverStorable49 [2021-08-21 13:23:27,077 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash 841891467, now seen corresponding path program 38 times [2021-08-21 13:23:27,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:27,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944702823] [2021-08-21 13:23:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:27,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:27,531 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 13:23:27,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:27,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944702823] [2021-08-21 13:23:27,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944702823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:27,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336703605] [2021-08-21 13:23:27,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:23:27,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:27,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:27,532 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 13:23:27,535 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 13:23:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:30,085 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 13:23:30,571 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 13:23:30,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336703605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:30,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:30,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:23:30,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685150171] [2021-08-21 13:23:30,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:23:30,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:30,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:23:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:23:30,572 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:31,690 INFO L93 Difference]: Finished difference Result 530 states and 1036 transitions. [2021-08-21 13:23:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:23:31,691 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:23:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:31,692 INFO L225 Difference]: With dead ends: 530 [2021-08-21 13:23:31,692 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 13:23:31,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1164.4ms TimeCoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:23:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 13:23:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 395. [2021-08-21 13:23:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.010152284263959) internal successors, (792), 394 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 13:23:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 792 transitions. [2021-08-21 13:23:31,698 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 792 transitions. Word has length 30 [2021-08-21 13:23:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:31,698 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 792 transitions. [2021-08-21 13:23:31,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 792 transitions. [2021-08-21 13:23:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:31,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:31,699 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 13:23:31,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:31,899 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1723957191, now seen corresponding path program 39 times [2021-08-21 13:23:31,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:31,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862938467] [2021-08-21 13:23:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:31,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:32,446 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 13:23:32,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:32,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862938467] [2021-08-21 13:23:32,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862938467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:32,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329134896] [2021-08-21 13:23:32,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:23:32,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:32,448 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 13:23:32,448 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 13:23:34,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:23:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:35,007 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 13:23:35,510 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 13:23:35,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329134896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:35,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:35,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:23:35,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076742840] [2021-08-21 13:23:35,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:23:35,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:23:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:23:35,511 INFO L87 Difference]: Start difference. First operand 395 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:36,795 INFO L93 Difference]: Finished difference Result 464 states and 917 transitions. [2021-08-21 13:23:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:23:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:23:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:36,796 INFO L225 Difference]: With dead ends: 464 [2021-08-21 13:23:36,796 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 13:23:36,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1398.6ms TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:23:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 13:23:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 393. [2021-08-21 13:23:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 13:23:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-08-21 13:23:36,801 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-08-21 13:23:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:36,802 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-08-21 13:23:36,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:23:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-08-21 13:23:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:36,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:36,803 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 13:23:36,826 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 13:23:37,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 13:23:37,005 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1102343387, now seen corresponding path program 40 times [2021-08-21 13:23:37,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:37,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921998527] [2021-08-21 13:23:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:37,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:37,492 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 13:23:37,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:37,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921998527] [2021-08-21 13:23:37,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921998527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:37,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750037671] [2021-08-21 13:23:37,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:23:37,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:37,493 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 13:23:37,494 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 13:23:39,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:23:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:40,119 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 13:23:40,546 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 13:23:40,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750037671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:40,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:40,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:23:40,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842588259] [2021-08-21 13:23:40,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:23:40,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:23:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:23:40,547 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:23:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:41,576 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-08-21 13:23:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:23:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:23:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:41,577 INFO L225 Difference]: With dead ends: 537 [2021-08-21 13:23:41,577 INFO L226 Difference]: Without dead ends: 492 [2021-08-21 13:23:41,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1090.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:23:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-21 13:23:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 385. [2021-08-21 13:23:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0104166666666665) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 13:23:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 772 transitions. [2021-08-21 13:23:41,582 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 772 transitions. Word has length 30 [2021-08-21 13:23:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 772 transitions. [2021-08-21 13:23:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:23:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 772 transitions. [2021-08-21 13:23:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:41,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:41,583 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 13:23:41,605 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 13:23:41,783 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,SelfDestructingSolverStorable52 [2021-08-21 13:23:41,784 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash 845949541, now seen corresponding path program 41 times [2021-08-21 13:23:41,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:41,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782380354] [2021-08-21 13:23:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:41,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:42,184 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 13:23:42,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:42,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782380354] [2021-08-21 13:23:42,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782380354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:42,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028910158] [2021-08-21 13:23:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:23:42,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:42,186 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:42,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 13:23:44,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:44,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:44,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:23:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:44,868 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 13:23:45,402 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 13:23:45,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028910158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:45,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:45,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-08-21 13:23:45,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563095438] [2021-08-21 13:23:45,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:23:45,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:23:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:23:45,403 INFO L87 Difference]: Start difference. First operand 385 states and 772 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 13:23:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:46,283 INFO L93 Difference]: Finished difference Result 520 states and 1025 transitions. [2021-08-21 13:23:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:23:46,284 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 30 [2021-08-21 13:23:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:46,284 INFO L225 Difference]: With dead ends: 520 [2021-08-21 13:23:46,284 INFO L226 Difference]: Without dead ends: 487 [2021-08-21 13:23:46,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 981.8ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:23:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-21 13:23:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 383. [2021-08-21 13:23:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0104712041884816) internal successors, (768), 382 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 13:23:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 768 transitions. [2021-08-21 13:23:46,289 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 768 transitions. Word has length 30 [2021-08-21 13:23:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:46,290 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 768 transitions. [2021-08-21 13:23:46,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 13:23:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 768 transitions. [2021-08-21 13:23:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:46,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:46,290 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 13:23:46,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 13:23:46,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:46,491 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:46,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1493559199, now seen corresponding path program 42 times [2021-08-21 13:23:46,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:46,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731509020] [2021-08-21 13:23:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:46,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:46,900 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 13:23:46,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:46,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731509020] [2021-08-21 13:23:46,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731509020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:46,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641312408] [2021-08-21 13:23:46,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:23:46,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:46,902 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:46,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 13:23:49,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:23:49,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:49,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:49,691 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 13:23:50,363 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 13:23:50,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641312408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:50,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:50,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-08-21 13:23:50,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734754299] [2021-08-21 13:23:50,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 13:23:50,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 13:23:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:23:50,365 INFO L87 Difference]: Start difference. First operand 383 states and 768 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 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 13:23:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:51,438 INFO L93 Difference]: Finished difference Result 518 states and 1021 transitions. [2021-08-21 13:23:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:23:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 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 30 [2021-08-21 13:23:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:51,439 INFO L225 Difference]: With dead ends: 518 [2021-08-21 13:23:51,439 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 13:23:51,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1155.1ms TimeCoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:23:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 13:23:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 380. [2021-08-21 13:23:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0131926121372032) internal successors, (763), 379 states have internal predecessors, (763), 0 states have call successors, (0), 0 states 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 13:23:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 763 transitions. [2021-08-21 13:23:51,445 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 763 transitions. Word has length 30 [2021-08-21 13:23:51,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:51,446 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 763 transitions. [2021-08-21 13:23:51,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 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 13:23:51,446 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 763 transitions. [2021-08-21 13:23:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:51,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:51,447 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 13:23:51,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 13:23:51,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 13:23:51,661 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 866178951, now seen corresponding path program 43 times [2021-08-21 13:23:51,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:51,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923180710] [2021-08-21 13:23:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:51,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:52,068 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 13:23:52,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:52,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923180710] [2021-08-21 13:23:52,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923180710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:52,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348597558] [2021-08-21 13:23:52,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:23:52,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:52,073 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:52,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 13:23:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:54,898 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 13:23:55,324 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 13:23:55,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348597558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:55,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:55,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-08-21 13:23:55,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419921903] [2021-08-21 13:23:55,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 13:23:55,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 13:23:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:23:55,325 INFO L87 Difference]: Start difference. First operand 380 states and 763 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:56,234 INFO L93 Difference]: Finished difference Result 555 states and 1087 transitions. [2021-08-21 13:23:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:23:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:23:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:56,236 INFO L225 Difference]: With dead ends: 555 [2021-08-21 13:23:56,236 INFO L226 Difference]: Without dead ends: 546 [2021-08-21 13:23:56,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 938.7ms TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:23:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-21 13:23:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 404. [2021-08-21 13:23:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 13:23:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-08-21 13:23:56,243 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-08-21 13:23:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:56,243 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-08-21 13:23:56,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-08-21 13:23:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:23:56,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:56,244 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 13:23:56,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:56,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 13:23:56,445 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:23:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1748244675, now seen corresponding path program 44 times [2021-08-21 13:23:56,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:56,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002748382] [2021-08-21 13:23:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:56,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:56,828 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 13:23:56,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:56,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002748382] [2021-08-21 13:23:56,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002748382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:56,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867441095] [2021-08-21 13:23:56,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:23:56,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:56,830 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:56,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 13:23:59,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:59,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:59,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:59,559 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 13:24:00,091 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 13:24:00,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867441095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:00,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:00,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-08-21 13:24:00,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125847580] [2021-08-21 13:24:00,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:24:00,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:24:00,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:24:00,092 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:01,178 INFO L93 Difference]: Finished difference Result 500 states and 993 transitions. [2021-08-21 13:24:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:24:01,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:01,179 INFO L225 Difference]: With dead ends: 500 [2021-08-21 13:24:01,179 INFO L226 Difference]: Without dead ends: 485 [2021-08-21 13:24:01,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1144.4ms TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:24:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-21 13:24:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 402. [2021-08-21 13:24:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 13:24:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-08-21 13:24:01,185 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-08-21 13:24:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:01,185 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-08-21 13:24:01,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-08-21 13:24:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:01,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:01,186 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 13:24:01,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 13:24:01,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:01,386 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1078055903, now seen corresponding path program 45 times [2021-08-21 13:24:01,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:01,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005551117] [2021-08-21 13:24:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:01,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:01,754 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 13:24:01,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:01,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005551117] [2021-08-21 13:24:01,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005551117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:01,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219419018] [2021-08-21 13:24:01,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:01,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:01,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:01,777 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:01,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 13:24:04,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:04,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:04,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:24:04,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:04,615 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 13:24:04,989 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 13:24:04,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219419018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:04,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:04,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-08-21 13:24:04,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555520243] [2021-08-21 13:24:04,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:24:04,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:24:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:24:04,990 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:05,827 INFO L93 Difference]: Finished difference Result 542 states and 1067 transitions. [2021-08-21 13:24:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:24:05,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:05,828 INFO L225 Difference]: With dead ends: 542 [2021-08-21 13:24:05,828 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 13:24:05,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 866.2ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:24:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 13:24:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 401. [2021-08-21 13:24:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0075) internal successors, (803), 400 states have internal predecessors, (803), 0 states have call successors, (0), 0 states 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 13:24:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 803 transitions. [2021-08-21 13:24:05,843 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 803 transitions. Word has length 30 [2021-08-21 13:24:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:05,843 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 803 transitions. [2021-08-21 13:24:05,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 803 transitions. [2021-08-21 13:24:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:05,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:05,844 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 13:24:05,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 13:24:06,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:06,045 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:06,045 INFO L82 PathProgramCache]: Analyzing trace with hash 440982895, now seen corresponding path program 46 times [2021-08-21 13:24:06,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:06,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165200630] [2021-08-21 13:24:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:06,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:06,425 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 13:24:06,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:06,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165200630] [2021-08-21 13:24:06,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165200630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:06,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080437001] [2021-08-21 13:24:06,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:06,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:06,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:06,427 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:06,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 13:24:09,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:09,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:09,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:09,240 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 13:24:09,641 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 13:24:09,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080437001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:09,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:09,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-08-21 13:24:09,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123118794] [2021-08-21 13:24:09,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 13:24:09,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:09,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 13:24:09,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:24:09,642 INFO L87 Difference]: Start difference. First operand 401 states and 803 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:10,658 INFO L93 Difference]: Finished difference Result 544 states and 1070 transitions. [2021-08-21 13:24:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:24:10,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:10,660 INFO L225 Difference]: With dead ends: 544 [2021-08-21 13:24:10,660 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 13:24:10,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 914.3ms TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:24:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 13:24:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 388. [2021-08-21 13:24:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 13:24:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-08-21 13:24:10,665 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-08-21 13:24:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:10,665 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-08-21 13:24:10,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-08-21 13:24:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:10,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:10,666 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 13:24:10,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:10,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:10,878 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -970774179, now seen corresponding path program 47 times [2021-08-21 13:24:10,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:10,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534939126] [2021-08-21 13:24:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:10,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:11,244 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 13:24:11,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:11,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534939126] [2021-08-21 13:24:11,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534939126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:11,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058960115] [2021-08-21 13:24:11,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:11,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:11,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:11,246 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:11,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 13:24:14,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:24:14,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:24:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:14,123 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 13:24:14,535 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 13:24:14,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058960115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:14,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:14,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-21 13:24:14,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619127685] [2021-08-21 13:24:14,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:24:14,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:14,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:24:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:14,536 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:15,364 INFO L93 Difference]: Finished difference Result 557 states and 1092 transitions. [2021-08-21 13:24:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:24:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:15,365 INFO L225 Difference]: With dead ends: 557 [2021-08-21 13:24:15,365 INFO L226 Difference]: Without dead ends: 548 [2021-08-21 13:24:15,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 880.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:24:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-08-21 13:24:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 405. [2021-08-21 13:24:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states 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 13:24:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-08-21 13:24:15,370 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-08-21 13:24:15,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:15,370 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-08-21 13:24:15,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-08-21 13:24:15,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:15,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:15,371 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 13:24:15,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 13:24:15,585 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -88708455, now seen corresponding path program 48 times [2021-08-21 13:24:15,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:15,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756068317] [2021-08-21 13:24:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:15,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:15,948 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 13:24:15,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756068317] [2021-08-21 13:24:15,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756068317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:15,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869212854] [2021-08-21 13:24:15,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:15,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:15,950 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:15,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 13:24:18,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:24:18,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:24:18,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:18,860 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 13:24:19,269 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 13:24:19,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869212854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:19,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:19,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-21 13:24:19,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644400754] [2021-08-21 13:24:19,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:24:19,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:24:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:19,270 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:20,305 INFO L93 Difference]: Finished difference Result 501 states and 995 transitions. [2021-08-21 13:24:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:24:20,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:20,307 INFO L225 Difference]: With dead ends: 501 [2021-08-21 13:24:20,307 INFO L226 Difference]: Without dead ends: 486 [2021-08-21 13:24:20,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1022.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:24:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-21 13:24:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 403. [2021-08-21 13:24:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 13:24:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-08-21 13:24:20,312 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-08-21 13:24:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-08-21 13:24:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-08-21 13:24:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:20,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:20,313 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 13:24:20,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:20,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 13:24:20,529 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1379958263, now seen corresponding path program 49 times [2021-08-21 13:24:20,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:20,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874772728] [2021-08-21 13:24:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:20,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:20,928 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 13:24:20,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:20,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874772728] [2021-08-21 13:24:20,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874772728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:20,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503560877] [2021-08-21 13:24:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:20,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:20,936 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:20,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 13:24:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:23,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:23,977 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 13:24:24,358 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 13:24:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503560877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:24,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:24,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-08-21 13:24:24,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654173679] [2021-08-21 13:24:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:24:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:24:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:24:24,360 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:25,275 INFO L93 Difference]: Finished difference Result 545 states and 1071 transitions. [2021-08-21 13:24:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:24:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:25,276 INFO L225 Difference]: With dead ends: 545 [2021-08-21 13:24:25,276 INFO L226 Difference]: Without dead ends: 528 [2021-08-21 13:24:25,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 877.7ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:24:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-08-21 13:24:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 402. [2021-08-21 13:24:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 13:24:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-08-21 13:24:25,283 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-08-21 13:24:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:25,283 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-08-21 13:24:25,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-08-21 13:24:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:25,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:25,284 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 13:24:25,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:25,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 13:24:25,484 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1395970235, now seen corresponding path program 50 times [2021-08-21 13:24:25,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:25,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333521579] [2021-08-21 13:24:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:25,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:25,838 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 13:24:25,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:25,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333521579] [2021-08-21 13:24:25,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333521579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:25,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583344] [2021-08-21 13:24:25,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:25,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:25,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:25,840 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:25,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 13:24:28,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:28,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:28,856 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 13:24:29,379 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 13:24:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:29,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:29,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-08-21 13:24:29,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705036623] [2021-08-21 13:24:29,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:24:29,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:24:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:24:29,380 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:30,248 INFO L93 Difference]: Finished difference Result 552 states and 1085 transitions. [2021-08-21 13:24:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:24:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:30,249 INFO L225 Difference]: With dead ends: 552 [2021-08-21 13:24:30,249 INFO L226 Difference]: Without dead ends: 511 [2021-08-21 13:24:30,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 920.5ms TimeCoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:24:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-08-21 13:24:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 389. [2021-08-21 13:24:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 13:24:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-08-21 13:24:30,255 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-08-21 13:24:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:30,255 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-08-21 13:24:30,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-08-21 13:24:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:30,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:30,256 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 13:24:30,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:30,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:30,456 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1026634883, now seen corresponding path program 51 times [2021-08-21 13:24:30,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:30,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905759950] [2021-08-21 13:24:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:30,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:30,975 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 13:24:30,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:30,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905759950] [2021-08-21 13:24:30,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905759950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:30,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891222226] [2021-08-21 13:24:30,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:30,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:30,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:30,976 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:31,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 13:24:33,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:33,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:33,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:24:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:34,026 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 13:24:34,459 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 13:24:34,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891222226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:34,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:34,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-21 13:24:34,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309311201] [2021-08-21 13:24:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:24:34,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:34,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:24:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:24:34,461 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:35,739 INFO L93 Difference]: Finished difference Result 580 states and 1133 transitions. [2021-08-21 13:24:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:24:35,739 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:35,740 INFO L225 Difference]: With dead ends: 580 [2021-08-21 13:24:35,740 INFO L226 Difference]: Without dead ends: 571 [2021-08-21 13:24:35,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1165.2ms TimeCoverageRelationStatistics Valid=241, Invalid=2209, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:24:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-21 13:24:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 403. [2021-08-21 13:24:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 13:24:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-08-21 13:24:35,746 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-08-21 13:24:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:35,746 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-08-21 13:24:35,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-08-21 13:24:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:35,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:35,747 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 13:24:35,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 13:24:35,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:35,948 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1908700607, now seen corresponding path program 52 times [2021-08-21 13:24:35,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:35,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529192877] [2021-08-21 13:24:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:35,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:36,331 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 13:24:36,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:36,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529192877] [2021-08-21 13:24:36,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529192877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:36,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162022926] [2021-08-21 13:24:36,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:36,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:36,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:36,332 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:36,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 13:24:39,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:39,428 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 13:24:39,910 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 13:24:39,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162022926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:39,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:39,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-21 13:24:39,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863199484] [2021-08-21 13:24:39,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:24:39,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:24:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:24:39,912 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:41,250 INFO L93 Difference]: Finished difference Result 516 states and 1018 transitions. [2021-08-21 13:24:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:24:41,250 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:41,251 INFO L225 Difference]: With dead ends: 516 [2021-08-21 13:24:41,251 INFO L226 Difference]: Without dead ends: 501 [2021-08-21 13:24:41,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1342.9ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:24:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-21 13:24:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 401. [2021-08-21 13:24:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0125) internal successors, (805), 400 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 13:24:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 805 transitions. [2021-08-21 13:24:41,256 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 805 transitions. Word has length 30 [2021-08-21 13:24:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:41,257 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 805 transitions. [2021-08-21 13:24:41,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 805 transitions. [2021-08-21 13:24:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:41,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:41,258 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 13:24:41,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:41,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 13:24:41,485 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash -917599971, now seen corresponding path program 53 times [2021-08-21 13:24:41,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:41,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106118046] [2021-08-21 13:24:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:41,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:41,876 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 13:24:41,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:41,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106118046] [2021-08-21 13:24:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106118046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:41,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434188961] [2021-08-21 13:24:41,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:41,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:41,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:41,878 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:41,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 13:24:44,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:24:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:44,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:24:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:45,046 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 13:24:45,485 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 13:24:45,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434188961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:45,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:45,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-21 13:24:45,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003606077] [2021-08-21 13:24:45,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:24:45,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:24:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:45,488 INFO L87 Difference]: Start difference. First operand 401 states and 805 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:46,834 INFO L93 Difference]: Finished difference Result 578 states and 1134 transitions. [2021-08-21 13:24:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:24:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:46,836 INFO L225 Difference]: With dead ends: 578 [2021-08-21 13:24:46,836 INFO L226 Difference]: Without dead ends: 561 [2021-08-21 13:24:46,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1278.4ms TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:24:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-21 13:24:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 410. [2021-08-21 13:24:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0073349633251834) internal successors, (821), 409 states have internal predecessors, (821), 0 states have call successors, (0), 0 states 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 13:24:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 821 transitions. [2021-08-21 13:24:46,841 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 821 transitions. Word has length 30 [2021-08-21 13:24:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:46,841 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 821 transitions. [2021-08-21 13:24:46,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 821 transitions. [2021-08-21 13:24:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:46,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:46,842 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 13:24:46,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:47,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 13:24:47,042 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash 601438827, now seen corresponding path program 54 times [2021-08-21 13:24:47,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:47,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910637754] [2021-08-21 13:24:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:47,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:47,408 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 13:24:47,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:47,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910637754] [2021-08-21 13:24:47,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910637754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:47,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010793906] [2021-08-21 13:24:47,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:47,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:47,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:47,409 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:47,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 13:24:50,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:24:50,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:24:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:50,637 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 13:24:51,059 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 13:24:51,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010793906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:51,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:51,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-21 13:24:51,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368640114] [2021-08-21 13:24:51,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:24:51,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:51,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:24:51,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:24:51,061 INFO L87 Difference]: Start difference. First operand 410 states and 821 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:52,566 INFO L93 Difference]: Finished difference Result 577 states and 1131 transitions. [2021-08-21 13:24:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:24:52,566 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:52,567 INFO L225 Difference]: With dead ends: 577 [2021-08-21 13:24:52,567 INFO L226 Difference]: Without dead ends: 533 [2021-08-21 13:24:52,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1251.7ms TimeCoverageRelationStatistics Valid=293, Invalid=2787, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:24:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-21 13:24:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 400. [2021-08-21 13:24:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9974937343358397) internal successors, (797), 399 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 13:24:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 797 transitions. [2021-08-21 13:24:52,572 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 797 transitions. Word has length 30 [2021-08-21 13:24:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:52,572 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 797 transitions. [2021-08-21 13:24:52,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 797 transitions. [2021-08-21 13:24:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:52,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:52,573 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 13:24:52,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:52,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:52,773 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash -28981581, now seen corresponding path program 55 times [2021-08-21 13:24:52,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:52,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776859576] [2021-08-21 13:24:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:52,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:53,151 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 13:24:53,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:53,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776859576] [2021-08-21 13:24:53,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776859576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:53,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549739626] [2021-08-21 13:24:53,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:53,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:53,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:53,153 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:53,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 13:24:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:56,455 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 13:24:56,935 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 13:24:56,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549739626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:56,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:56,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-21 13:24:56,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051585925] [2021-08-21 13:24:56,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:24:56,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:56,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:24:56,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:24:56,936 INFO L87 Difference]: Start difference. First operand 400 states and 797 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:57,824 INFO L93 Difference]: Finished difference Result 533 states and 1038 transitions. [2021-08-21 13:24:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:24:57,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:24:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:57,825 INFO L225 Difference]: With dead ends: 533 [2021-08-21 13:24:57,825 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 13:24:57,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 920.7ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:24:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 13:24:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 402. [2021-08-21 13:24:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.9950124688279303) internal successors, (800), 401 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 13:24:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 800 transitions. [2021-08-21 13:24:57,838 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 800 transitions. Word has length 30 [2021-08-21 13:24:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:57,839 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 800 transitions. [2021-08-21 13:24:57,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 800 transitions. [2021-08-21 13:24:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:24:57,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:57,839 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 13:24:57,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:58,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 13:24:58,040 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:24:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash 853084143, now seen corresponding path program 56 times [2021-08-21 13:24:58,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:58,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801569826] [2021-08-21 13:24:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:58,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:58,471 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 13:24:58,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:58,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801569826] [2021-08-21 13:24:58,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801569826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:58,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972064971] [2021-08-21 13:24:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:58,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:58,472 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:58,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 13:25:01,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:01,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:25:01,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:01,851 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 13:25:02,311 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 13:25:02,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972064971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:02,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:02,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-21 13:25:02,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313103340] [2021-08-21 13:25:02,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:25:02,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:25:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:25:02,312 INFO L87 Difference]: Start difference. First operand 402 states and 800 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:03,359 INFO L93 Difference]: Finished difference Result 477 states and 941 transitions. [2021-08-21 13:25:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:25:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:25:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:03,360 INFO L225 Difference]: With dead ends: 477 [2021-08-21 13:25:03,360 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 13:25:03,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1116.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:25:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 13:25:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 392. [2021-08-21 13:25:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 13:25:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-08-21 13:25:03,365 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-08-21 13:25:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:03,365 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-08-21 13:25:03,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-08-21 13:25:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:03,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:03,366 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 13:25:03,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:03,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 13:25:03,566 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash -24923507, now seen corresponding path program 57 times [2021-08-21 13:25:03,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:03,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38567020] [2021-08-21 13:25:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:03,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:03,940 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 13:25:03,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:03,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38567020] [2021-08-21 13:25:03,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38567020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:03,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769710494] [2021-08-21 13:25:03,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:03,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:03,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:03,941 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:03,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 13:25:07,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:25:07,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:25:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:07,315 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 13:25:07,765 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 13:25:07,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769710494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:07,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:07,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-21 13:25:07,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377424939] [2021-08-21 13:25:07,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:25:07,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:25:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:25:07,766 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:08,755 INFO L93 Difference]: Finished difference Result 526 states and 1033 transitions. [2021-08-21 13:25:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:25:08,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 13:25:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:08,756 INFO L225 Difference]: With dead ends: 526 [2021-08-21 13:25:08,756 INFO L226 Difference]: Without dead ends: 493 [2021-08-21 13:25:08,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 940.0ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:25:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-21 13:25:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 388. [2021-08-21 13:25:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 13:25:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-08-21 13:25:08,761 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-08-21 13:25:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:08,761 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-08-21 13:25:08,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-08-21 13:25:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:08,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:08,762 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 13:25:08,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:08,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 13:25:08,963 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1032283343, now seen corresponding path program 58 times [2021-08-21 13:25:08,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:08,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737972368] [2021-08-21 13:25:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:08,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:09,396 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 13:25:09,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:09,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737972368] [2021-08-21 13:25:09,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737972368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:09,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216180445] [2021-08-21 13:25:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:09,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:09,398 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:09,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 13:25:12,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:12,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:25:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:12,880 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 13:25:13,359 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 13:25:13,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216180445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:13,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:13,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:25:13,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170316445] [2021-08-21 13:25:13,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:25:13,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:13,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:25:13,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:13,361 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:14,412 INFO L93 Difference]: Finished difference Result 567 states and 1110 transitions. [2021-08-21 13:25:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:25:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:25:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:14,413 INFO L225 Difference]: With dead ends: 567 [2021-08-21 13:25:14,413 INFO L226 Difference]: Without dead ends: 558 [2021-08-21 13:25:14,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1164.0ms TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:25:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-08-21 13:25:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 406. [2021-08-21 13:25:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 13:25:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-08-21 13:25:14,418 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-08-21 13:25:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:14,418 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-08-21 13:25:14,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-08-21 13:25:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:14,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:14,419 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 13:25:14,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:14,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 13:25:14,620 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash -150217619, now seen corresponding path program 59 times [2021-08-21 13:25:14,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:14,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077222296] [2021-08-21 13:25:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:14,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:15,029 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 13:25:15,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077222296] [2021-08-21 13:25:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077222296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222977667] [2021-08-21 13:25:15,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:15,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:15,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:15,031 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:15,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 13:25:18,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:25:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:25:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:18,607 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 13:25:19,098 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 13:25:19,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222977667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:19,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:19,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:25:19,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652200448] [2021-08-21 13:25:19,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:25:19,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:25:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:19,099 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:20,306 INFO L93 Difference]: Finished difference Result 511 states and 1013 transitions. [2021-08-21 13:25:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:25:20,306 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:25:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:20,307 INFO L225 Difference]: With dead ends: 511 [2021-08-21 13:25:20,307 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 13:25:20,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1311.5ms TimeCoverageRelationStatistics Valid=291, Invalid=2571, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:25:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 13:25:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 404. [2021-08-21 13:25:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 13:25:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-08-21 13:25:20,311 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-08-21 13:25:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-08-21 13:25:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-08-21 13:25:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:20,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:20,312 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 13:25:20,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:20,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:20,513 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1318449099, now seen corresponding path program 60 times [2021-08-21 13:25:20,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:20,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149250269] [2021-08-21 13:25:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:20,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:20,942 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 13:25:20,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:20,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149250269] [2021-08-21 13:25:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149250269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:20,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463838655] [2021-08-21 13:25:20,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:20,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:20,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:20,943 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:20,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 13:25:24,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:25:24,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:25:24,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:24,545 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 13:25:24,982 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 13:25:24,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463838655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:24,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:24,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:25:24,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056754537] [2021-08-21 13:25:24,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:25:24,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:25:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:25:24,983 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:25:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:26,023 INFO L93 Difference]: Finished difference Result 561 states and 1102 transitions. [2021-08-21 13:25:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:25:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:25:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:26,024 INFO L225 Difference]: With dead ends: 561 [2021-08-21 13:25:26,024 INFO L226 Difference]: Without dead ends: 544 [2021-08-21 13:25:26,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1126.1ms TimeCoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:25:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-21 13:25:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 403. [2021-08-21 13:25:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 13:25:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-08-21 13:25:26,031 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-08-21 13:25:26,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:26,032 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-08-21 13:25:26,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:25:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-08-21 13:25:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:26,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:26,033 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 13:25:26,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:26,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:26,257 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1457479399, now seen corresponding path program 61 times [2021-08-21 13:25:26,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:26,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204628704] [2021-08-21 13:25:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:26,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:26,658 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 13:25:26,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:26,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204628704] [2021-08-21 13:25:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204628704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:26,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370752302] [2021-08-21 13:25:26,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:26,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:26,659 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:26,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 13:25:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:25:30,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:30,326 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 13:25:30,808 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 13:25:30,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370752302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:30,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:30,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:25:30,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232461921] [2021-08-21 13:25:30,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:25:30,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:25:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:30,809 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:31,933 INFO L93 Difference]: Finished difference Result 563 states and 1105 transitions. [2021-08-21 13:25:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:25:31,933 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:25:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:31,934 INFO L225 Difference]: With dead ends: 563 [2021-08-21 13:25:31,934 INFO L226 Difference]: Without dead ends: 522 [2021-08-21 13:25:31,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1183.6ms TimeCoverageRelationStatistics Valid=265, Invalid=2597, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:25:31,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-21 13:25:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 390. [2021-08-21 13:25:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0102827763496145) internal successors, (782), 389 states have internal predecessors, (782), 0 states have call successors, (0), 0 states 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 13:25:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 782 transitions. [2021-08-21 13:25:31,939 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 782 transitions. Word has length 30 [2021-08-21 13:25:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:31,939 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 782 transitions. [2021-08-21 13:25:31,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 782 transitions. [2021-08-21 13:25:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:31,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:31,940 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 13:25:31,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:32,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:32,141 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash 965125719, now seen corresponding path program 62 times [2021-08-21 13:25:32,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:32,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963511079] [2021-08-21 13:25:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:32,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:32,583 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 13:25:32,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:32,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963511079] [2021-08-21 13:25:32,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963511079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:32,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370627733] [2021-08-21 13:25:32,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:25:32,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:32,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:32,597 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:32,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 13:25:36,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:25:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:36,273 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 13:25:36,799 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 13:25:36,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370627733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:36,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:36,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 13:25:36,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82719132] [2021-08-21 13:25:36,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:25:36,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:25:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:25:36,801 INFO L87 Difference]: Start difference. First operand 390 states and 782 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:25:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:38,189 INFO L93 Difference]: Finished difference Result 589 states and 1152 transitions. [2021-08-21 13:25:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:25:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:25:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:38,191 INFO L225 Difference]: With dead ends: 589 [2021-08-21 13:25:38,191 INFO L226 Difference]: Without dead ends: 580 [2021-08-21 13:25:38,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1317.8ms TimeCoverageRelationStatistics Valid=322, Invalid=3218, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:25:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-21 13:25:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 404. [2021-08-21 13:25:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0124069478908186) internal successors, (811), 403 states have internal predecessors, (811), 0 states have call successors, (0), 0 states 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 13:25:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 811 transitions. [2021-08-21 13:25:38,196 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 811 transitions. Word has length 30 [2021-08-21 13:25:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:38,196 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 811 transitions. [2021-08-21 13:25:38,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:25:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 811 transitions. [2021-08-21 13:25:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:38,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:38,197 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 13:25:38,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:38,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 13:25:38,397 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1847191443, now seen corresponding path program 63 times [2021-08-21 13:25:38,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:38,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130635172] [2021-08-21 13:25:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:38,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:39,008 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 13:25:39,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:39,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130635172] [2021-08-21 13:25:39,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130635172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:39,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981699175] [2021-08-21 13:25:39,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:39,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:39,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:39,009 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:39,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 13:25:42,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:25:42,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:42,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:25:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:42,727 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 13:25:43,208 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 13:25:43,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981699175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:43,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:43,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:25:43,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220048214] [2021-08-21 13:25:43,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:25:43,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:25:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:43,209 INFO L87 Difference]: Start difference. First operand 404 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:44,640 INFO L93 Difference]: Finished difference Result 522 states and 1031 transitions. [2021-08-21 13:25:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:25:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:25:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:44,641 INFO L225 Difference]: With dead ends: 522 [2021-08-21 13:25:44,641 INFO L226 Difference]: Without dead ends: 507 [2021-08-21 13:25:44,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1605.5ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:25:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-21 13:25:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 402. [2021-08-21 13:25:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 13:25:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-08-21 13:25:44,646 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-08-21 13:25:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:44,646 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-08-21 13:25:44,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-08-21 13:25:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:44,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:44,647 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 13:25:44,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:44,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:44,848 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash -979109135, now seen corresponding path program 64 times [2021-08-21 13:25:44,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:44,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713395490] [2021-08-21 13:25:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:44,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:45,250 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 13:25:45,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:45,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713395490] [2021-08-21 13:25:45,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713395490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:45,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531341421] [2021-08-21 13:25:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:45,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:45,251 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:45,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 13:25:48,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:25:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:49,094 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 13:25:49,517 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 13:25:49,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531341421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:49,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:49,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:25:49,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756197706] [2021-08-21 13:25:49,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:25:49,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:25:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:25:49,518 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:25:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:51,005 INFO L93 Difference]: Finished difference Result 592 states and 1163 transitions. [2021-08-21 13:25:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:25:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:25:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:51,007 INFO L225 Difference]: With dead ends: 592 [2021-08-21 13:25:51,007 INFO L226 Difference]: Without dead ends: 575 [2021-08-21 13:25:51,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1413.4ms TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:25:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-21 13:25:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 411. [2021-08-21 13:25:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0073170731707317) internal successors, (823), 410 states have internal predecessors, (823), 0 states have call successors, (0), 0 states 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 13:25:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 823 transitions. [2021-08-21 13:25:51,013 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 823 transitions. Word has length 30 [2021-08-21 13:25:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:51,013 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 823 transitions. [2021-08-21 13:25:51,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:25:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 823 transitions. [2021-08-21 13:25:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:51,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:51,014 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 13:25:51,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 13:25:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:51,215 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash 539929663, now seen corresponding path program 65 times [2021-08-21 13:25:51,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:51,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940205844] [2021-08-21 13:25:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:51,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:51,712 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 13:25:51,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:51,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940205844] [2021-08-21 13:25:51,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940205844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:51,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719028364] [2021-08-21 13:25:51,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:51,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:51,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:51,717 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:51,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 13:25:55,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:25:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:25:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:55,555 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 13:25:56,009 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 13:25:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719028364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:56,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:56,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:25:56,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310274289] [2021-08-21 13:25:56,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:25:56,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:25:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:56,011 INFO L87 Difference]: Start difference. First operand 411 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:57,444 INFO L93 Difference]: Finished difference Result 591 states and 1160 transitions. [2021-08-21 13:25:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:25:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:25:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:57,445 INFO L225 Difference]: With dead ends: 591 [2021-08-21 13:25:57,445 INFO L226 Difference]: Without dead ends: 547 [2021-08-21 13:25:57,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1442.1ms TimeCoverageRelationStatistics Valid=321, Invalid=3219, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:25:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-08-21 13:25:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 401. [2021-08-21 13:25:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9975) internal successors, (799), 400 states have internal predecessors, (799), 0 states have call successors, (0), 0 states 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 13:25:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 799 transitions. [2021-08-21 13:25:57,453 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 799 transitions. Word has length 30 [2021-08-21 13:25:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:57,453 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 799 transitions. [2021-08-21 13:25:57,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:25:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 799 transitions. [2021-08-21 13:25:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:25:57,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:57,454 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 13:25:57,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:57,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 13:25:57,681 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:25:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -90490745, now seen corresponding path program 66 times [2021-08-21 13:25:57,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:57,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563955245] [2021-08-21 13:25:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:57,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:58,089 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 13:25:58,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:58,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563955245] [2021-08-21 13:25:58,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563955245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:58,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800494986] [2021-08-21 13:25:58,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:58,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:58,090 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:58,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 13:26:01,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:26:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:26:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:01,975 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 13:26:02,486 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 13:26:02,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800494986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:02,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:02,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:02,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694543788] [2021-08-21 13:26:02,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:02,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:02,487 INFO L87 Difference]: Start difference. First operand 401 states and 799 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:03,323 INFO L93 Difference]: Finished difference Result 528 states and 1029 transitions. [2021-08-21 13:26:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:26:03,323 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:03,324 INFO L225 Difference]: With dead ends: 528 [2021-08-21 13:26:03,324 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 13:26:03,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1000.9ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:26:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 13:26:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 403. [2021-08-21 13:26:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9950248756218905) internal successors, (802), 402 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 13:26:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 802 transitions. [2021-08-21 13:26:03,329 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 802 transitions. Word has length 30 [2021-08-21 13:26:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:03,329 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 802 transitions. [2021-08-21 13:26:03,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 802 transitions. [2021-08-21 13:26:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:03,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:03,330 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 13:26:03,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 13:26:03,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 13:26:03,530 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:03,531 INFO L82 PathProgramCache]: Analyzing trace with hash 791574979, now seen corresponding path program 67 times [2021-08-21 13:26:03,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:03,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863990038] [2021-08-21 13:26:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:03,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:03,934 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 13:26:03,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:03,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863990038] [2021-08-21 13:26:03,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863990038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:03,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506742803] [2021-08-21 13:26:03,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:26:03,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:03,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:03,935 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:03,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 13:26:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:07,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:26:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:07,844 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 13:26:08,394 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 13:26:08,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506742803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:08,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:08,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:08,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895652722] [2021-08-21 13:26:08,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:08,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:08,396 INFO L87 Difference]: Start difference. First operand 403 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:09,486 INFO L93 Difference]: Finished difference Result 462 states and 911 transitions. [2021-08-21 13:26:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:26:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:09,487 INFO L225 Difference]: With dead ends: 462 [2021-08-21 13:26:09,487 INFO L226 Difference]: Without dead ends: 439 [2021-08-21 13:26:09,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1214.1ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:26:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-21 13:26:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 393. [2021-08-21 13:26:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 13:26:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2021-08-21 13:26:09,492 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2021-08-21 13:26:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:09,492 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2021-08-21 13:26:09,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2021-08-21 13:26:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:09,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:09,493 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 13:26:09,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 13:26:09,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:09,693 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:09,694 INFO L82 PathProgramCache]: Analyzing trace with hash -86432671, now seen corresponding path program 68 times [2021-08-21 13:26:09,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:09,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308213022] [2021-08-21 13:26:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:09,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:10,132 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 13:26:10,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:10,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308213022] [2021-08-21 13:26:10,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308213022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:10,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352181365] [2021-08-21 13:26:10,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:10,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:10,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:10,134 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:10,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 13:26:13,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:13,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:13,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:26:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:14,121 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 13:26:14,598 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 13:26:14,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352181365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:14,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:14,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:14,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926304481] [2021-08-21 13:26:14,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:14,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:14,599 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:15,439 INFO L93 Difference]: Finished difference Result 530 states and 1043 transitions. [2021-08-21 13:26:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:26:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:15,440 INFO L225 Difference]: With dead ends: 530 [2021-08-21 13:26:15,440 INFO L226 Difference]: Without dead ends: 497 [2021-08-21 13:26:15,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1073.0ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:26:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-21 13:26:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 389. [2021-08-21 13:26:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 13:26:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-08-21 13:26:15,445 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-08-21 13:26:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:15,445 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-08-21 13:26:15,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-08-21 13:26:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:15,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:15,446 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 13:26:15,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:15,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:15,646 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:15,647 INFO L82 PathProgramCache]: Analyzing trace with hash -255678137, now seen corresponding path program 69 times [2021-08-21 13:26:15,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:15,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851496887] [2021-08-21 13:26:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:15,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:16,034 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 13:26:16,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:16,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851496887] [2021-08-21 13:26:16,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851496887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:16,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945560669] [2021-08-21 13:26:16,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:26:16,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:16,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:16,036 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:16,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 13:26:19,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:26:19,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:26:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:20,043 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 13:26:20,495 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 13:26:20,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945560669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:20,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:20,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:20,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384690052] [2021-08-21 13:26:20,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:20,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:20,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:20,496 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:21,661 INFO L93 Difference]: Finished difference Result 599 states and 1173 transitions. [2021-08-21 13:26:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:26:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:21,662 INFO L225 Difference]: With dead ends: 599 [2021-08-21 13:26:21,662 INFO L226 Difference]: Without dead ends: 590 [2021-08-21 13:26:21,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1215.9ms TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:26:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-21 13:26:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 404. [2021-08-21 13:26:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states 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 13:26:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2021-08-21 13:26:21,667 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2021-08-21 13:26:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:21,667 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2021-08-21 13:26:21,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2021-08-21 13:26:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:21,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:21,668 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 13:26:21,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:21,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 13:26:21,869 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash 626387587, now seen corresponding path program 70 times [2021-08-21 13:26:21,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:21,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706802049] [2021-08-21 13:26:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:21,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:22,258 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 13:26:22,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:22,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706802049] [2021-08-21 13:26:22,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706802049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:22,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135465464] [2021-08-21 13:26:22,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:26:22,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:22,259 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:22,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 13:26:26,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:26:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:26:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:26,372 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 13:26:26,845 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 13:26:26,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135465464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:26,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:26,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:26,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094997814] [2021-08-21 13:26:26,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:26,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:26,847 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:28,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:28,281 INFO L93 Difference]: Finished difference Result 526 states and 1040 transitions. [2021-08-21 13:26:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:26:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:28,283 INFO L225 Difference]: With dead ends: 526 [2021-08-21 13:26:28,283 INFO L226 Difference]: Without dead ends: 511 [2021-08-21 13:26:28,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1433.2ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:26:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-08-21 13:26:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 402. [2021-08-21 13:26:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0149625935162097) internal successors, (808), 401 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 13:26:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 808 transitions. [2021-08-21 13:26:28,289 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 808 transitions. Word has length 30 [2021-08-21 13:26:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:28,290 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 808 transitions. [2021-08-21 13:26:28,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 808 transitions. [2021-08-21 13:26:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:28,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:28,291 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 13:26:28,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:28,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:28,517 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2095054305, now seen corresponding path program 71 times [2021-08-21 13:26:28,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:28,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470247515] [2021-08-21 13:26:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:28,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:28,906 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 13:26:28,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:28,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470247515] [2021-08-21 13:26:28,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470247515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:28,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501475004] [2021-08-21 13:26:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:26:28,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:28,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:28,907 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:28,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 13:26:32,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:26:32,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:26:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:33,040 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 13:26:33,462 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 13:26:33,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501475004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:33,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:33,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:26:33,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650039206] [2021-08-21 13:26:33,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:26:33,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:26:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:26:33,463 INFO L87 Difference]: Start difference. First operand 402 states and 808 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:26:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:34,873 INFO L93 Difference]: Finished difference Result 637 states and 1246 transitions. [2021-08-21 13:26:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:26:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:26:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:34,875 INFO L225 Difference]: With dead ends: 637 [2021-08-21 13:26:34,875 INFO L226 Difference]: Without dead ends: 620 [2021-08-21 13:26:34,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1308.8ms TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:26:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-08-21 13:26:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 411. [2021-08-21 13:26:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 13:26:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-08-21 13:26:34,881 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-08-21 13:26:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:34,882 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-08-21 13:26:34,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:26:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-08-21 13:26:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:34,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:34,883 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 13:26:34,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 13:26:35,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:35,097 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash -680874193, now seen corresponding path program 72 times [2021-08-21 13:26:35,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:35,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896287372] [2021-08-21 13:26:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:35,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:35,496 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 13:26:35,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:35,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896287372] [2021-08-21 13:26:35,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896287372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:35,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141216000] [2021-08-21 13:26:35,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:26:35,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:35,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:35,498 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:35,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 13:26:39,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:26:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:26:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:39,660 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 13:26:40,110 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 13:26:40,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141216000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:40,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:40,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20497342] [2021-08-21 13:26:40,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:40,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:40,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:40,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:40,112 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:41,524 INFO L93 Difference]: Finished difference Result 636 states and 1243 transitions. [2021-08-21 13:26:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:26:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:41,525 INFO L225 Difference]: With dead ends: 636 [2021-08-21 13:26:41,525 INFO L226 Difference]: Without dead ends: 592 [2021-08-21 13:26:41,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1313.5ms TimeCoverageRelationStatistics Valid=321, Invalid=3219, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:26:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-21 13:26:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 401. [2021-08-21 13:26:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0) internal successors, (800), 400 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 13:26:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 800 transitions. [2021-08-21 13:26:41,530 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 800 transitions. Word has length 30 [2021-08-21 13:26:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:41,531 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 800 transitions. [2021-08-21 13:26:41,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 800 transitions. [2021-08-21 13:26:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:41,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:41,532 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 13:26:41,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:41,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 13:26:41,732 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:41,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1311294601, now seen corresponding path program 73 times [2021-08-21 13:26:41,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:41,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273155567] [2021-08-21 13:26:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:41,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:42,121 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 13:26:42,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:42,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273155567] [2021-08-21 13:26:42,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273155567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:42,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827174264] [2021-08-21 13:26:42,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:26:42,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:42,123 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:42,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 13:26:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:26:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:46,340 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 13:26:46,814 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 13:26:46,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827174264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:46,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:46,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:46,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994214614] [2021-08-21 13:26:46,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:46,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:46,816 INFO L87 Difference]: Start difference. First operand 401 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:47,714 INFO L93 Difference]: Finished difference Result 547 states and 1068 transitions. [2021-08-21 13:26:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:26:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:47,715 INFO L225 Difference]: With dead ends: 547 [2021-08-21 13:26:47,716 INFO L226 Difference]: Without dead ends: 538 [2021-08-21 13:26:47,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 963.7ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:26:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-21 13:26:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 403. [2021-08-21 13:26:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9975124378109452) internal successors, (803), 402 states have internal predecessors, (803), 0 states have call successors, (0), 0 states 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 13:26:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 803 transitions. [2021-08-21 13:26:47,722 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 803 transitions. Word has length 30 [2021-08-21 13:26:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:47,722 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 803 transitions. [2021-08-21 13:26:47,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 803 transitions. [2021-08-21 13:26:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:47,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:47,724 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 13:26:47,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:47,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:47,937 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash -429228877, now seen corresponding path program 74 times [2021-08-21 13:26:47,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:47,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686179518] [2021-08-21 13:26:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:47,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:48,336 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 13:26:48,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:48,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686179518] [2021-08-21 13:26:48,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686179518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:48,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273733563] [2021-08-21 13:26:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:48,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:48,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:48,338 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:48,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 13:26:52,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:52,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:26:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:52,577 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 13:26:53,099 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 13:26:53,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273733563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:53,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:53,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:53,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906403435] [2021-08-21 13:26:53,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:53,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:53,100 INFO L87 Difference]: Start difference. First operand 403 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:54,216 INFO L93 Difference]: Finished difference Result 471 states and 930 transitions. [2021-08-21 13:26:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:26:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:26:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:54,217 INFO L225 Difference]: With dead ends: 471 [2021-08-21 13:26:54,217 INFO L226 Difference]: Without dead ends: 448 [2021-08-21 13:26:54,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1146.5ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:26:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-08-21 13:26:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 393. [2021-08-21 13:26:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 13:26:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-08-21 13:26:54,221 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-08-21 13:26:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:54,222 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-08-21 13:26:54,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:26:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-08-21 13:26:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:26:54,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:54,222 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 13:26:54,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:54,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:54,423 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:26:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:54,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1307236527, now seen corresponding path program 75 times [2021-08-21 13:26:54,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:54,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715623625] [2021-08-21 13:26:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:54,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:54,815 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 13:26:54,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:54,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715623625] [2021-08-21 13:26:54,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715623625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:54,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611521599] [2021-08-21 13:26:54,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:26:54,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:54,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:54,819 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:54,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 13:26:58,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:26:58,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:26:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:59,191 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 13:26:59,664 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 13:26:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611521599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:59,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:59,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:26:59,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968840918] [2021-08-21 13:26:59,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:26:59,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:26:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:59,665 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:00,613 INFO L93 Difference]: Finished difference Result 552 states and 1087 transitions. [2021-08-21 13:27:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:27:00,614 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:27:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:00,614 INFO L225 Difference]: With dead ends: 552 [2021-08-21 13:27:00,615 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 13:27:00,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1035.5ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:27:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 13:27:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 390. [2021-08-21 13:27:00,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.012853470437018) internal successors, (783), 389 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 13:27:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 783 transitions. [2021-08-21 13:27:00,619 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 783 transitions. Word has length 30 [2021-08-21 13:27:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:00,620 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 783 transitions. [2021-08-21 13:27:00,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 783 transitions. [2021-08-21 13:27:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:00,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:00,620 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 13:27:00,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 13:27:00,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 13:27:00,821 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:00,821 INFO L82 PathProgramCache]: Analyzing trace with hash -821099023, now seen corresponding path program 76 times [2021-08-21 13:27:00,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:00,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472888713] [2021-08-21 13:27:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:00,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:01,232 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 13:27:01,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:01,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472888713] [2021-08-21 13:27:01,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472888713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:01,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177099245] [2021-08-21 13:27:01,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:27:01,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:01,233 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:01,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 13:27:05,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:27:05,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:27:05,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:05,638 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 13:27:06,127 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 13:27:06,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177099245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:06,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:06,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:27:06,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437469424] [2021-08-21 13:27:06,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:27:06,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:27:06,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:27:06,129 INFO L87 Difference]: Start difference. First operand 390 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:07,013 INFO L93 Difference]: Finished difference Result 542 states and 1057 transitions. [2021-08-21 13:27:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:27:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:27:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:07,014 INFO L225 Difference]: With dead ends: 542 [2021-08-21 13:27:07,014 INFO L226 Difference]: Without dead ends: 533 [2021-08-21 13:27:07,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 989.9ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:27:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-21 13:27:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 404. [2021-08-21 13:27:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 13:27:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-08-21 13:27:07,019 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-08-21 13:27:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:07,019 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-08-21 13:27:07,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-08-21 13:27:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:07,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:07,020 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 13:27:07,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:07,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:07,221 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 60966701, now seen corresponding path program 77 times [2021-08-21 13:27:07,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:07,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048641305] [2021-08-21 13:27:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:07,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:07,633 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 13:27:07,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:07,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048641305] [2021-08-21 13:27:07,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048641305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:07,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128680881] [2021-08-21 13:27:07,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:27:07,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:07,635 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:07,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 13:27:11,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:27:11,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:27:11,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:12,095 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 13:27:12,604 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 13:27:12,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128680881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:12,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:12,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:27:12,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120389031] [2021-08-21 13:27:12,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:27:12,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:12,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:27:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:27:12,606 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:13,698 INFO L93 Difference]: Finished difference Result 475 states and 938 transitions. [2021-08-21 13:27:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:27:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:27:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:13,699 INFO L225 Difference]: With dead ends: 475 [2021-08-21 13:27:13,699 INFO L226 Difference]: Without dead ends: 460 [2021-08-21 13:27:13,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1151.2ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:27:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-21 13:27:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 402. [2021-08-21 13:27:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 13:27:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-08-21 13:27:13,704 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-08-21 13:27:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:13,704 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-08-21 13:27:13,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-08-21 13:27:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:13,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:13,704 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 13:27:13,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 13:27:13,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:13,905 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1529633419, now seen corresponding path program 78 times [2021-08-21 13:27:13,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:13,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483583038] [2021-08-21 13:27:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:13,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:14,313 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 13:27:14,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:14,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483583038] [2021-08-21 13:27:14,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483583038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:14,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697396526] [2021-08-21 13:27:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:27:14,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:14,315 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:14,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 13:27:18,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:27:18,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:27:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:18,799 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 13:27:19,230 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 13:27:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697396526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:19,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:19,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:27:19,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556433085] [2021-08-21 13:27:19,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:27:19,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:27:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:27:19,231 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:27:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:20,043 INFO L93 Difference]: Finished difference Result 549 states and 1077 transitions. [2021-08-21 13:27:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:27:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:27:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:20,044 INFO L225 Difference]: With dead ends: 549 [2021-08-21 13:27:20,044 INFO L226 Difference]: Without dead ends: 504 [2021-08-21 13:27:20,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:27:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-21 13:27:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 394. [2021-08-21 13:27:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states 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 13:27:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2021-08-21 13:27:20,049 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2021-08-21 13:27:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:20,049 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2021-08-21 13:27:20,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:27:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2021-08-21 13:27:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:20,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:20,050 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 13:27:20,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:20,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:20,250 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash -817040949, now seen corresponding path program 79 times [2021-08-21 13:27:20,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:20,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835004643] [2021-08-21 13:27:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:20,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:20,682 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 13:27:20,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:20,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835004643] [2021-08-21 13:27:20,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835004643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:20,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509946870] [2021-08-21 13:27:20,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:27:20,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:20,683 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:20,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 13:27:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:24,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:27:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:25,193 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 13:27:25,688 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 13:27:25,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509946870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:25,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:25,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:27:25,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297029623] [2021-08-21 13:27:25,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:27:25,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:25,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:27:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:27:25,689 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:26,444 INFO L93 Difference]: Finished difference Result 532 states and 1046 transitions. [2021-08-21 13:27:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:27:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:27:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:26,445 INFO L225 Difference]: With dead ends: 532 [2021-08-21 13:27:26,445 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 13:27:26,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 964.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:27:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 13:27:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 392. [2021-08-21 13:27:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 13:27:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-08-21 13:27:26,451 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-08-21 13:27:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:26,451 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-08-21 13:27:26,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-08-21 13:27:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:26,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:26,452 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 13:27:26,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:26,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 13:27:26,666 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:26,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1138417607, now seen corresponding path program 80 times [2021-08-21 13:27:26,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:26,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481928673] [2021-08-21 13:27:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:26,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:27,077 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 13:27:27,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:27,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481928673] [2021-08-21 13:27:27,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481928673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:27,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981771264] [2021-08-21 13:27:27,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:27:27,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:27,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:27,079 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:27,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 13:27:31,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:27:31,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:27:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:31,693 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 13:27:32,215 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 13:27:32,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981771264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:32,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:32,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-08-21 13:27:32,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64673002] [2021-08-21 13:27:32,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:27:32,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:27:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:27:32,216 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:27:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:33,123 INFO L93 Difference]: Finished difference Result 530 states and 1042 transitions. [2021-08-21 13:27:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:27:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:27:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:33,124 INFO L225 Difference]: With dead ends: 530 [2021-08-21 13:27:33,124 INFO L226 Difference]: Without dead ends: 494 [2021-08-21 13:27:33,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1054.2ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:27:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-21 13:27:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 388. [2021-08-21 13:27:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 13:27:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-08-21 13:27:33,128 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-08-21 13:27:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:33,129 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-08-21 13:27:33,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:27:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-08-21 13:27:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:33,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:33,129 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 13:27:33,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:33,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:33,330 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:33,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1698717151, now seen corresponding path program 81 times [2021-08-21 13:27:33,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:33,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614832938] [2021-08-21 13:27:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:33,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:33,740 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 13:27:33,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:33,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614832938] [2021-08-21 13:27:33,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614832938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:33,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183752281] [2021-08-21 13:27:33,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:27:33,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:33,742 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:33,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 13:27:38,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:27:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:27:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:38,442 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 13:27:38,895 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 13:27:38,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183752281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:38,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:38,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:27:38,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635636698] [2021-08-21 13:27:38,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:27:38,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:27:38,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:27:38,897 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:40,037 INFO L93 Difference]: Finished difference Result 561 states and 1100 transitions. [2021-08-21 13:27:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:27:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:27:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:40,038 INFO L225 Difference]: With dead ends: 561 [2021-08-21 13:27:40,038 INFO L226 Difference]: Without dead ends: 552 [2021-08-21 13:27:40,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1152.3ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:27:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-21 13:27:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 409. [2021-08-21 13:27:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 13:27:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2021-08-21 13:27:40,043 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2021-08-21 13:27:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:40,043 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2021-08-21 13:27:40,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2021-08-21 13:27:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:40,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:40,044 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 13:27:40,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:40,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:40,259 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash -816651427, now seen corresponding path program 82 times [2021-08-21 13:27:40,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:40,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928852430] [2021-08-21 13:27:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:40,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:40,664 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 13:27:40,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:40,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928852430] [2021-08-21 13:27:40,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928852430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:40,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640499150] [2021-08-21 13:27:40,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:27:40,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:40,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:40,665 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:40,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 13:27:45,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:27:45,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:27:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:45,400 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 13:27:45,893 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 13:27:45,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640499150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:45,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:45,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:27:45,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880356620] [2021-08-21 13:27:45,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:27:45,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:45,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:27:45,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:27:45,894 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:47,222 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-08-21 13:27:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:27:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:27:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:47,223 INFO L225 Difference]: With dead ends: 503 [2021-08-21 13:27:47,223 INFO L226 Difference]: Without dead ends: 488 [2021-08-21 13:27:47,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1345.2ms TimeCoverageRelationStatistics Valid=287, Invalid=2575, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:27:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-08-21 13:27:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 407. [2021-08-21 13:27:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states 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 13:27:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-08-21 13:27:47,229 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-08-21 13:27:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:47,229 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-08-21 13:27:47,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:27:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-08-21 13:27:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:47,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:47,229 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 13:27:47,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 13:27:47,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:47,430 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash 652015291, now seen corresponding path program 83 times [2021-08-21 13:27:47,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:47,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188168827] [2021-08-21 13:27:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:47,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:47,878 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 13:27:47,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:47,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188168827] [2021-08-21 13:27:47,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188168827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:47,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789762214] [2021-08-21 13:27:47,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:27:47,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:47,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:47,905 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:47,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 13:27:52,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:27:52,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:52,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:27:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:52,680 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 13:27:53,076 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 13:27:53,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789762214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:53,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:53,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:27:53,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924400446] [2021-08-21 13:27:53,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:27:53,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:27:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:27:53,077 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:27:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:54,133 INFO L93 Difference]: Finished difference Result 556 states and 1094 transitions. [2021-08-21 13:27:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:27:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:27:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:54,134 INFO L225 Difference]: With dead ends: 556 [2021-08-21 13:27:54,134 INFO L226 Difference]: Without dead ends: 539 [2021-08-21 13:27:54,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1073.4ms TimeCoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:27:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-21 13:27:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 406. [2021-08-21 13:27:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 13:27:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-08-21 13:27:54,139 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-08-21 13:27:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:54,139 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-08-21 13:27:54,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:27:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-08-21 13:27:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:27:54,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:54,140 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 13:27:54,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:54,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:54,340 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:27:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2123913207, now seen corresponding path program 84 times [2021-08-21 13:27:54,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:54,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086402868] [2021-08-21 13:27:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:54,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:54,782 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 13:27:54,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086402868] [2021-08-21 13:27:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086402868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096288922] [2021-08-21 13:27:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:27:54,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:54,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:54,783 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:54,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 13:27:59,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:27:59,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:27:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:59,651 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 13:28:00,084 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 13:28:00,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096288922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:00,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:00,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:28:00,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151236826] [2021-08-21 13:28:00,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:28:00,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:28:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:00,086 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:01,188 INFO L93 Difference]: Finished difference Result 558 states and 1097 transitions. [2021-08-21 13:28:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:28:01,188 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:28:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:01,189 INFO L225 Difference]: With dead ends: 558 [2021-08-21 13:28:01,189 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 13:28:01,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1165.1ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:28:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 13:28:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 393. [2021-08-21 13:28:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 13:28:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-08-21 13:28:01,194 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-08-21 13:28:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:01,194 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-08-21 13:28:01,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-08-21 13:28:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:01,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:01,194 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 13:28:01,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:01,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 13:28:01,395 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 298691911, now seen corresponding path program 85 times [2021-08-21 13:28:01,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:01,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824055364] [2021-08-21 13:28:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:01,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:01,881 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 13:28:01,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:01,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824055364] [2021-08-21 13:28:01,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824055364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:01,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055165718] [2021-08-21 13:28:01,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:01,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:01,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:01,882 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:01,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 13:28:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:06,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:06,807 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 13:28:07,247 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 13:28:07,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055165718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:07,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:07,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:28:07,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580869125] [2021-08-21 13:28:07,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:28:07,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:28:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:07,249 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:08,700 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-08-21 13:28:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:28:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:28:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:08,702 INFO L225 Difference]: With dead ends: 588 [2021-08-21 13:28:08,702 INFO L226 Difference]: Without dead ends: 579 [2021-08-21 13:28:08,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1346.3ms TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:28:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-21 13:28:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 407. [2021-08-21 13:28:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states 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 13:28:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2021-08-21 13:28:08,707 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2021-08-21 13:28:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:08,707 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2021-08-21 13:28:08,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2021-08-21 13:28:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:08,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:08,708 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 13:28:08,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 13:28:08,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 13:28:08,908 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1180757635, now seen corresponding path program 86 times [2021-08-21 13:28:08,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:08,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744372921] [2021-08-21 13:28:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:08,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:09,317 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 13:28:09,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:09,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744372921] [2021-08-21 13:28:09,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744372921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:09,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789935892] [2021-08-21 13:28:09,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:09,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:09,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:09,330 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:09,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 13:28:14,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:14,373 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 13:28:14,898 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 13:28:14,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789935892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:14,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:14,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 13:28:14,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76474127] [2021-08-21 13:28:14,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:28:14,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:28:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:28:14,899 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:28:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:16,383 INFO L93 Difference]: Finished difference Result 571 states and 1130 transitions. [2021-08-21 13:28:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:28:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:28:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:16,384 INFO L225 Difference]: With dead ends: 571 [2021-08-21 13:28:16,384 INFO L226 Difference]: Without dead ends: 556 [2021-08-21 13:28:16,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1521.9ms TimeCoverageRelationStatistics Valid=357, Invalid=3303, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:28:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-21 13:28:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 405. [2021-08-21 13:28:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 13:28:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2021-08-21 13:28:16,391 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2021-08-21 13:28:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:16,391 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2021-08-21 13:28:16,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:28:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2021-08-21 13:28:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:16,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:16,392 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 13:28:16,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:16,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:16,597 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:16,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1645542943, now seen corresponding path program 87 times [2021-08-21 13:28:16,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:16,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157280037] [2021-08-21 13:28:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:16,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:17,004 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 13:28:17,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:17,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157280037] [2021-08-21 13:28:17,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157280037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:17,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983514065] [2021-08-21 13:28:17,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:17,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:17,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:17,005 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:17,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 13:28:21,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:21,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:28:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:21,972 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 13:28:22,379 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 13:28:22,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983514065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:22,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:22,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:28:22,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468781895] [2021-08-21 13:28:22,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:28:22,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:22,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:28:22,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:28:22,380 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:28:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:23,712 INFO L93 Difference]: Finished difference Result 595 states and 1169 transitions. [2021-08-21 13:28:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:28:23,712 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:28:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:23,713 INFO L225 Difference]: With dead ends: 595 [2021-08-21 13:28:23,713 INFO L226 Difference]: Without dead ends: 578 [2021-08-21 13:28:23,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1344.9ms TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:28:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-21 13:28:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 414. [2021-08-21 13:28:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0072639225181597) internal successors, (829), 413 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 13:28:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 829 transitions. [2021-08-21 13:28:23,719 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 829 transitions. Word has length 30 [2021-08-21 13:28:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:23,719 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 829 transitions. [2021-08-21 13:28:23,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:28:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 829 transitions. [2021-08-21 13:28:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:23,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:23,720 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 13:28:23,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:23,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:23,920 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:23,921 INFO L82 PathProgramCache]: Analyzing trace with hash -126504145, now seen corresponding path program 88 times [2021-08-21 13:28:23,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:23,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805926161] [2021-08-21 13:28:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:23,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:24,364 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 13:28:24,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:24,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805926161] [2021-08-21 13:28:24,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805926161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:24,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565545875] [2021-08-21 13:28:24,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:24,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:24,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:24,366 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:24,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 13:28:29,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:29,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:29,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:29,324 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 13:28:29,769 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 13:28:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565545875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:29,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:29,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:28:29,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355363652] [2021-08-21 13:28:29,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:28:29,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:28:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:29,770 INFO L87 Difference]: Start difference. First operand 414 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:31,299 INFO L93 Difference]: Finished difference Result 594 states and 1166 transitions. [2021-08-21 13:28:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:28:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:28:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:31,301 INFO L225 Difference]: With dead ends: 594 [2021-08-21 13:28:31,301 INFO L226 Difference]: Without dead ends: 550 [2021-08-21 13:28:31,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1407.7ms TimeCoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:28:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-21 13:28:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 404. [2021-08-21 13:28:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9975186104218363) internal successors, (805), 403 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 13:28:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 805 transitions. [2021-08-21 13:28:31,308 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 805 transitions. Word has length 30 [2021-08-21 13:28:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:31,308 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 805 transitions. [2021-08-21 13:28:31,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 805 transitions. [2021-08-21 13:28:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:31,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:31,309 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 13:28:31,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:31,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 13:28:31,523 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:31,524 INFO L82 PathProgramCache]: Analyzing trace with hash -756924553, now seen corresponding path program 89 times [2021-08-21 13:28:31,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:31,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386849535] [2021-08-21 13:28:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:31,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:31,927 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 13:28:31,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:31,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386849535] [2021-08-21 13:28:31,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386849535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:31,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808475625] [2021-08-21 13:28:31,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:31,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:31,928 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:31,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 13:28:36,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:36,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:37,008 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 13:28:37,451 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 13:28:37,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808475625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:37,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:37,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:28:37,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084536977] [2021-08-21 13:28:37,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:28:37,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:28:37,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:37,452 INFO L87 Difference]: Start difference. First operand 404 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:38,421 INFO L93 Difference]: Finished difference Result 533 states and 1039 transitions. [2021-08-21 13:28:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:28:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:28:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:38,422 INFO L225 Difference]: With dead ends: 533 [2021-08-21 13:28:38,423 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 13:28:38,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1008.4ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:28:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 13:28:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 406. [2021-08-21 13:28:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9950617283950618) internal successors, (808), 405 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 13:28:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 808 transitions. [2021-08-21 13:28:38,427 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 808 transitions. Word has length 30 [2021-08-21 13:28:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:38,427 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 808 transitions. [2021-08-21 13:28:38,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 808 transitions. [2021-08-21 13:28:38,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:38,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:38,428 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 13:28:38,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 13:28:38,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:38,629 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash 125141171, now seen corresponding path program 90 times [2021-08-21 13:28:38,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:38,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950051607] [2021-08-21 13:28:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:38,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:39,039 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 13:28:39,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:39,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950051607] [2021-08-21 13:28:39,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950051607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:39,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705615816] [2021-08-21 13:28:39,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:39,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:39,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:39,040 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:39,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 13:28:43,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:28:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:43,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:44,174 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 13:28:44,627 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 13:28:44,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705615816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:44,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:44,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:28:44,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852506754] [2021-08-21 13:28:44,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:28:44,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:28:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:44,628 INFO L87 Difference]: Start difference. First operand 406 states and 808 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:45,649 INFO L93 Difference]: Finished difference Result 461 states and 909 transitions. [2021-08-21 13:28:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:28:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:28:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:45,650 INFO L225 Difference]: With dead ends: 461 [2021-08-21 13:28:45,650 INFO L226 Difference]: Without dead ends: 438 [2021-08-21 13:28:45,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1161.3ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:28:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-21 13:28:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 396. [2021-08-21 13:28:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states 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 13:28:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-08-21 13:28:45,654 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-08-21 13:28:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:45,654 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-08-21 13:28:45,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-08-21 13:28:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:45,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:45,655 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 13:28:45,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:45,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 13:28:45,856 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash -752866479, now seen corresponding path program 91 times [2021-08-21 13:28:45,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:45,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212051833] [2021-08-21 13:28:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:45,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:46,251 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 13:28:46,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:46,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212051833] [2021-08-21 13:28:46,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212051833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:46,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352114782] [2021-08-21 13:28:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:46,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:46,252 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 13:28:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:51,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:51,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:51,409 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 13:28:51,850 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 13:28:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352114782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:51,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:51,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:28:51,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688494450] [2021-08-21 13:28:51,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:28:51,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:28:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:51,851 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:52,770 INFO L93 Difference]: Finished difference Result 535 states and 1053 transitions. [2021-08-21 13:28:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:28:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:28:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:52,771 INFO L225 Difference]: With dead ends: 535 [2021-08-21 13:28:52,771 INFO L226 Difference]: Without dead ends: 502 [2021-08-21 13:28:52,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1034.5ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:28:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-21 13:28:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 392. [2021-08-21 13:28:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 13:28:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-08-21 13:28:52,776 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 30 [2021-08-21 13:28:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:52,776 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-08-21 13:28:52,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:28:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-08-21 13:28:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:28:52,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:52,776 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 13:28:52,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:52,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 13:28:52,977 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:28:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -922111945, now seen corresponding path program 92 times [2021-08-21 13:28:52,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:52,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3612251] [2021-08-21 13:28:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:52,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:53,376 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 13:28:53,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:53,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3612251] [2021-08-21 13:28:53,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3612251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:53,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812378171] [2021-08-21 13:28:53,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:53,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:53,378 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:53,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 13:28:58,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:58,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:58,570 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 13:28:59,051 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 13:28:59,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812378171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:59,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:59,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 13:28:59,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480628229] [2021-08-21 13:28:59,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:28:59,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:28:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:28:59,053 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:29:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:00,308 INFO L93 Difference]: Finished difference Result 604 states and 1183 transitions. [2021-08-21 13:29:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:29:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:29:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:00,309 INFO L225 Difference]: With dead ends: 604 [2021-08-21 13:29:00,309 INFO L226 Difference]: Without dead ends: 595 [2021-08-21 13:29:00,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1274.0ms TimeCoverageRelationStatistics Valid=314, Invalid=3226, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:29:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-21 13:29:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 407. [2021-08-21 13:29:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 13:29:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-08-21 13:29:00,314 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-08-21 13:29:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:00,314 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-08-21 13:29:00,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:29:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-08-21 13:29:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:00,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:00,315 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 13:29:00,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 13:29:00,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 13:29:00,516 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:00,517 INFO L82 PathProgramCache]: Analyzing trace with hash -40046221, now seen corresponding path program 93 times [2021-08-21 13:29:00,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:00,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884509716] [2021-08-21 13:29:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:00,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:00,920 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 13:29:00,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:00,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884509716] [2021-08-21 13:29:00,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884509716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:00,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703794449] [2021-08-21 13:29:00,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:29:00,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:00,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:00,921 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:00,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 13:29:05,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:29:05,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:29:05,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:06,193 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 13:29:06,647 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 13:29:06,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703794449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:06,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:06,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:29:06,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630386143] [2021-08-21 13:29:06,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:29:06,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:29:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:29:06,649 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:08,164 INFO L93 Difference]: Finished difference Result 529 states and 1046 transitions. [2021-08-21 13:29:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:29:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:29:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:08,165 INFO L225 Difference]: With dead ends: 529 [2021-08-21 13:29:08,165 INFO L226 Difference]: Without dead ends: 514 [2021-08-21 13:29:08,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1425.4ms TimeCoverageRelationStatistics Valid=314, Invalid=2878, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:29:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-08-21 13:29:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 405. [2021-08-21 13:29:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.014851485148515) internal successors, (814), 404 states have internal predecessors, (814), 0 states have call successors, (0), 0 states 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 13:29:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 814 transitions. [2021-08-21 13:29:08,170 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 814 transitions. Word has length 30 [2021-08-21 13:29:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 814 transitions. [2021-08-21 13:29:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 814 transitions. [2021-08-21 13:29:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:08,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:08,170 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 13:29:08,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 13:29:08,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:08,372 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:08,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1428620497, now seen corresponding path program 94 times [2021-08-21 13:29:08,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:08,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291489462] [2021-08-21 13:29:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:08,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:08,799 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 13:29:08,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:08,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291489462] [2021-08-21 13:29:08,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291489462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:08,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160124441] [2021-08-21 13:29:08,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:29:08,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:08,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:08,800 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:08,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 13:29:13,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:29:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:29:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:14,100 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 13:29:14,496 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 13:29:14,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160124441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:14,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:14,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:29:14,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083639222] [2021-08-21 13:29:14,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:29:14,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:29:14,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:29:14,497 INFO L87 Difference]: Start difference. First operand 405 states and 814 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:29:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:15,996 INFO L93 Difference]: Finished difference Result 640 states and 1252 transitions. [2021-08-21 13:29:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:29:15,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:29:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:15,997 INFO L225 Difference]: With dead ends: 640 [2021-08-21 13:29:15,997 INFO L226 Difference]: Without dead ends: 623 [2021-08-21 13:29:15,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1285.5ms TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:29:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-08-21 13:29:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 414. [2021-08-21 13:29:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.009685230024213) internal successors, (830), 413 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 13:29:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 830 transitions. [2021-08-21 13:29:16,002 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 830 transitions. Word has length 30 [2021-08-21 13:29:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:16,002 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 830 transitions. [2021-08-21 13:29:16,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:29:16,002 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 830 transitions. [2021-08-21 13:29:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:16,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:16,003 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 13:29:16,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 13:29:16,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:16,204 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1347308001, now seen corresponding path program 95 times [2021-08-21 13:29:16,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:16,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416347305] [2021-08-21 13:29:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:16,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:16,663 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 13:29:16,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:16,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416347305] [2021-08-21 13:29:16,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416347305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:16,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932340374] [2021-08-21 13:29:16,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:29:16,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:16,665 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:16,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 13:29:21,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:29:21,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:21,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:29:21,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:22,008 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 13:29:22,433 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 13:29:22,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932340374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:22,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:22,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:29:22,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44294914] [2021-08-21 13:29:22,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:29:22,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:29:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:29:22,434 INFO L87 Difference]: Start difference. First operand 414 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:23,935 INFO L93 Difference]: Finished difference Result 639 states and 1249 transitions. [2021-08-21 13:29:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:29:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:29:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:23,936 INFO L225 Difference]: With dead ends: 639 [2021-08-21 13:29:23,936 INFO L226 Difference]: Without dead ends: 595 [2021-08-21 13:29:23,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1307.9ms TimeCoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:29:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-21 13:29:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 404. [2021-08-21 13:29:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0) internal successors, (806), 403 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 13:29:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 806 transitions. [2021-08-21 13:29:23,941 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 806 transitions. Word has length 30 [2021-08-21 13:29:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:23,941 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 806 transitions. [2021-08-21 13:29:23,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 806 transitions. [2021-08-21 13:29:23,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:23,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:23,942 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 13:29:23,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 13:29:24,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 13:29:24,143 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1977728409, now seen corresponding path program 96 times [2021-08-21 13:29:24,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:24,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584286565] [2021-08-21 13:29:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:24,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:24,559 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 13:29:24,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:24,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584286565] [2021-08-21 13:29:24,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584286565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:24,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727031895] [2021-08-21 13:29:24,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:29:24,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:24,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:24,560 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:24,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 13:29:29,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:29:29,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:29,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:29:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:30,006 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 13:29:30,463 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 13:29:30,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727031895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:30,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:30,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:29:30,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84102492] [2021-08-21 13:29:30,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:29:30,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:29:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:29:30,465 INFO L87 Difference]: Start difference. First operand 404 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:31,339 INFO L93 Difference]: Finished difference Result 552 states and 1078 transitions. [2021-08-21 13:29:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:29:31,340 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:29:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:31,340 INFO L225 Difference]: With dead ends: 552 [2021-08-21 13:29:31,340 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 13:29:31,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 979.9ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:29:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 13:29:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 406. [2021-08-21 13:29:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.997530864197531) internal successors, (809), 405 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 13:29:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 809 transitions. [2021-08-21 13:29:31,345 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 809 transitions. Word has length 30 [2021-08-21 13:29:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:31,345 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 809 transitions. [2021-08-21 13:29:31,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 809 transitions. [2021-08-21 13:29:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:31,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:31,346 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 13:29:31,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 13:29:31,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:31,547 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:31,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1095662685, now seen corresponding path program 97 times [2021-08-21 13:29:31,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:31,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136090790] [2021-08-21 13:29:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:31,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:32,014 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 13:29:32,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:32,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136090790] [2021-08-21 13:29:32,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136090790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:32,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527114348] [2021-08-21 13:29:32,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:29:32,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:32,016 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:32,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 13:29:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:29:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:37,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:29:37,933 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 13:29:37,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527114348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:37,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:37,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:29:37,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640736007] [2021-08-21 13:29:37,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:29:37,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:29:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:29:37,934 INFO L87 Difference]: Start difference. First operand 406 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:39,014 INFO L93 Difference]: Finished difference Result 473 states and 934 transitions. [2021-08-21 13:29:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:29:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:29:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:39,015 INFO L225 Difference]: With dead ends: 473 [2021-08-21 13:29:39,015 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 13:29:39,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1113.3ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:29:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 13:29:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 396. [2021-08-21 13:29:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.010126582278481) internal successors, (794), 395 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 13:29:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 794 transitions. [2021-08-21 13:29:39,020 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 794 transitions. Word has length 30 [2021-08-21 13:29:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:39,020 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 794 transitions. [2021-08-21 13:29:39,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 794 transitions. [2021-08-21 13:29:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:39,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:39,020 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 13:29:39,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 13:29:39,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:39,221 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1973670335, now seen corresponding path program 98 times [2021-08-21 13:29:39,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:39,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884780233] [2021-08-21 13:29:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:39,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:39,623 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 13:29:39,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:39,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884780233] [2021-08-21 13:29:39,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884780233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:39,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071854298] [2021-08-21 13:29:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:29:39,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:39,624 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:39,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 13:29:44,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:29:44,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:29:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:45,155 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 13:29:45,601 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 13:29:45,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071854298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:45,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:45,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:29:45,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972752420] [2021-08-21 13:29:45,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:29:45,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:45,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:29:45,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:29:45,602 INFO L87 Difference]: Start difference. First operand 396 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:46,539 INFO L93 Difference]: Finished difference Result 557 states and 1097 transitions. [2021-08-21 13:29:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:29:46,540 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:29:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:46,541 INFO L225 Difference]: With dead ends: 557 [2021-08-21 13:29:46,541 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 13:29:46,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1001.0ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:29:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 13:29:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 393. [2021-08-21 13:29:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0127551020408165) internal successors, (789), 392 states have internal predecessors, (789), 0 states have call successors, (0), 0 states 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 13:29:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 789 transitions. [2021-08-21 13:29:46,545 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 789 transitions. Word has length 30 [2021-08-21 13:29:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:46,545 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 789 transitions. [2021-08-21 13:29:46,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:46,545 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 789 transitions. [2021-08-21 13:29:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:46,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:46,546 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 13:29:46,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 13:29:46,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:46,746 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:46,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1487532831, now seen corresponding path program 99 times [2021-08-21 13:29:46,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:46,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545620926] [2021-08-21 13:29:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:46,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:47,146 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 13:29:47,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:47,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545620926] [2021-08-21 13:29:47,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545620926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:47,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377342682] [2021-08-21 13:29:47,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:29:47,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:47,147 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:47,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 13:29:52,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:29:52,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:29:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:52,705 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 13:29:53,168 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 13:29:53,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377342682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:53,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:53,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:29:53,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957523729] [2021-08-21 13:29:53,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:29:53,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:29:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:29:53,169 INFO L87 Difference]: Start difference. First operand 393 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:54,128 INFO L93 Difference]: Finished difference Result 547 states and 1067 transitions. [2021-08-21 13:29:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:29:54,128 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:29:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:54,129 INFO L225 Difference]: With dead ends: 547 [2021-08-21 13:29:54,129 INFO L226 Difference]: Without dead ends: 538 [2021-08-21 13:29:54,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 984.5ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:29:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-21 13:29:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 407. [2021-08-21 13:29:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states 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 13:29:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-08-21 13:29:54,134 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-08-21 13:29:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:54,134 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-08-21 13:29:54,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:29:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-08-21 13:29:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:29:54,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:54,135 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 13:29:54,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 13:29:54,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 13:29:54,336 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:29:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash -605467107, now seen corresponding path program 100 times [2021-08-21 13:29:54,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:54,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219112576] [2021-08-21 13:29:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:54,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:54,754 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 13:29:54,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:54,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219112576] [2021-08-21 13:29:54,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219112576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:54,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588157284] [2021-08-21 13:29:54,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:29:54,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:54,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:54,756 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:54,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 13:30:00,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:30:00,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:00,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:30:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:00,454 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 13:30:00,920 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 13:30:00,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588157284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:00,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:00,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:30:00,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674540928] [2021-08-21 13:30:00,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:30:00,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:30:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:30:00,921 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:30:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:02,091 INFO L93 Difference]: Finished difference Result 478 states and 944 transitions. [2021-08-21 13:30:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:30:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:30:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:02,092 INFO L225 Difference]: With dead ends: 478 [2021-08-21 13:30:02,092 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 13:30:02,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1157.4ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:30:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 13:30:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 405. [2021-08-21 13:30:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states 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 13:30:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-08-21 13:30:02,096 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-08-21 13:30:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:02,096 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-08-21 13:30:02,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:30:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-08-21 13:30:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:02,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:02,097 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 13:30:02,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:02,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 13:30:02,298 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash 863199611, now seen corresponding path program 101 times [2021-08-21 13:30:02,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:02,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290129895] [2021-08-21 13:30:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:02,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:02,702 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 13:30:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:02,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290129895] [2021-08-21 13:30:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290129895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:02,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949687392] [2021-08-21 13:30:02,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:30:02,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:02,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:02,703 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:02,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 13:30:08,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:30:08,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:08,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:30:08,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:08,381 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 13:30:08,785 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 13:30:08,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949687392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:08,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:08,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:30:08,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302084049] [2021-08-21 13:30:08,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:30:08,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:30:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:30:08,786 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:30:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:09,662 INFO L93 Difference]: Finished difference Result 554 states and 1087 transitions. [2021-08-21 13:30:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:30:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:30:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:09,663 INFO L225 Difference]: With dead ends: 554 [2021-08-21 13:30:09,663 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 13:30:09,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 926.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:30:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 13:30:09,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2021-08-21 13:30:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 13:30:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-08-21 13:30:09,667 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-08-21 13:30:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:09,667 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-08-21 13:30:09,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:30:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-08-21 13:30:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:09,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:09,668 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 13:30:09,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 13:30:09,868 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1483474757, now seen corresponding path program 102 times [2021-08-21 13:30:09,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:09,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437610041] [2021-08-21 13:30:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:09,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:10,268 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 13:30:10,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:10,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437610041] [2021-08-21 13:30:10,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437610041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:10,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971735367] [2021-08-21 13:30:10,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:30:10,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:10,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:10,269 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:10,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 13:30:15,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:30:15,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:30:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:16,030 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 13:30:16,473 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 13:30:16,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971735367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:16,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:16,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:30:16,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409931456] [2021-08-21 13:30:16,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:30:16,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:30:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:30:16,475 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:30:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:17,240 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-08-21 13:30:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:30:17,240 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:30:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:17,241 INFO L225 Difference]: With dead ends: 537 [2021-08-21 13:30:17,241 INFO L226 Difference]: Without dead ends: 504 [2021-08-21 13:30:17,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 959.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:30:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-21 13:30:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 395. [2021-08-21 13:30:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 13:30:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2021-08-21 13:30:17,245 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2021-08-21 13:30:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:17,245 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2021-08-21 13:30:17,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:30:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2021-08-21 13:30:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:17,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:17,246 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 13:30:17,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:17,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 13:30:17,447 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 471983799, now seen corresponding path program 103 times [2021-08-21 13:30:17,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:17,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548212958] [2021-08-21 13:30:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:17,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:17,884 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 13:30:17,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:17,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548212958] [2021-08-21 13:30:17,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548212958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:17,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541366561] [2021-08-21 13:30:17,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:30:17,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:17,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:17,886 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:17,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 13:30:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:23,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:30:23,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:23,711 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 13:30:24,193 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 13:30:24,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541366561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:24,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:24,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-08-21 13:30:24,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519082265] [2021-08-21 13:30:24,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:30:24,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:24,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:30:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:30:24,195 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:30:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:25,082 INFO L93 Difference]: Finished difference Result 535 states and 1052 transitions. [2021-08-21 13:30:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:30:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:30:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:25,083 INFO L225 Difference]: With dead ends: 535 [2021-08-21 13:30:25,083 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 13:30:25,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1055.9ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:30:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 13:30:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 391. [2021-08-21 13:30:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.01025641025641) internal successors, (784), 390 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 13:30:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 784 transitions. [2021-08-21 13:30:25,088 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 784 transitions. Word has length 30 [2021-08-21 13:30:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:25,088 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 784 transitions. [2021-08-21 13:30:25,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:30:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 784 transitions. [2021-08-21 13:30:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:25,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:25,088 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 13:30:25,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:25,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:25,289 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 758969475, now seen corresponding path program 104 times [2021-08-21 13:30:25,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:25,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796610334] [2021-08-21 13:30:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:25,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:25,752 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 13:30:25,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:25,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796610334] [2021-08-21 13:30:25,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796610334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:25,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892626388] [2021-08-21 13:30:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:30:25,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:25,753 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:25,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 13:30:31,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:30:31,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:30:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:31,695 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 13:30:32,149 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 13:30:32,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892626388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:32,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:32,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 13:30:32,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607988207] [2021-08-21 13:30:32,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:30:32,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:32,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:30:32,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:30:32,150 INFO L87 Difference]: Start difference. First operand 391 states and 784 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:30:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:33,631 INFO L93 Difference]: Finished difference Result 663 states and 1302 transitions. [2021-08-21 13:30:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:30:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:30:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:33,633 INFO L225 Difference]: With dead ends: 663 [2021-08-21 13:30:33,633 INFO L226 Difference]: Without dead ends: 654 [2021-08-21 13:30:33,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1315.4ms TimeCoverageRelationStatistics Valid=318, Invalid=3342, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:30:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-08-21 13:30:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 409. [2021-08-21 13:30:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0220588235294117) internal successors, (825), 408 states have internal predecessors, (825), 0 states have call successors, (0), 0 states 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 13:30:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 825 transitions. [2021-08-21 13:30:33,638 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 825 transitions. Word has length 30 [2021-08-21 13:30:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:33,638 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 825 transitions. [2021-08-21 13:30:33,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:30:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 825 transitions. [2021-08-21 13:30:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:33,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:33,638 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 13:30:33,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 13:30:33,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:33,839 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:33,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1641035199, now seen corresponding path program 105 times [2021-08-21 13:30:33,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:33,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558943691] [2021-08-21 13:30:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:33,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:34,244 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 13:30:34,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558943691] [2021-08-21 13:30:34,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558943691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177934459] [2021-08-21 13:30:34,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:30:34,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:34,245 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:34,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 13:30:39,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:30:39,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:39,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:30:39,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:40,213 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 13:30:40,633 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 13:30:40,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177934459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:40,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:40,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:30:40,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844597932] [2021-08-21 13:30:40,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:30:40,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:40,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:30:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:30:40,634 INFO L87 Difference]: Start difference. First operand 409 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:30:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:42,222 INFO L93 Difference]: Finished difference Result 577 states and 1140 transitions. [2021-08-21 13:30:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:30:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:30:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:42,223 INFO L225 Difference]: With dead ends: 577 [2021-08-21 13:30:42,223 INFO L226 Difference]: Without dead ends: 562 [2021-08-21 13:30:42,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1475.2ms TimeCoverageRelationStatistics Valid=320, Invalid=2986, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:30:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-21 13:30:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 407. [2021-08-21 13:30:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.022167487684729) internal successors, (821), 406 states have internal predecessors, (821), 0 states have call successors, (0), 0 states 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 13:30:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 821 transitions. [2021-08-21 13:30:42,227 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 821 transitions. Word has length 30 [2021-08-21 13:30:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 821 transitions. [2021-08-21 13:30:42,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:30:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 821 transitions. [2021-08-21 13:30:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:42,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:42,228 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 13:30:42,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 13:30:42,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 13:30:42,429 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1185265379, now seen corresponding path program 106 times [2021-08-21 13:30:42,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:42,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2331075] [2021-08-21 13:30:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:42,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:42,820 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 13:30:42,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:42,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2331075] [2021-08-21 13:30:42,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2331075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:42,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294955757] [2021-08-21 13:30:42,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:30:42,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:42,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:42,821 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:42,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 13:30:48,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:30:48,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:30:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:48,833 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 13:30:49,211 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 13:30:49,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294955757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:49,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:49,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:30:49,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487904860] [2021-08-21 13:30:49,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:30:49,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:49,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:30:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:30:49,212 INFO L87 Difference]: Start difference. First operand 407 states and 821 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:30:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:50,946 INFO L93 Difference]: Finished difference Result 710 states and 1388 transitions. [2021-08-21 13:30:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:30:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:30:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:50,947 INFO L225 Difference]: With dead ends: 710 [2021-08-21 13:30:50,947 INFO L226 Difference]: Without dead ends: 693 [2021-08-21 13:30:50,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1358.7ms TimeCoverageRelationStatistics Valid=296, Invalid=3010, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:30:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-08-21 13:30:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 416. [2021-08-21 13:30:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.016867469879518) internal successors, (837), 415 states have internal predecessors, (837), 0 states have call successors, (0), 0 states 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 13:30:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 837 transitions. [2021-08-21 13:30:50,952 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 837 transitions. Word has length 30 [2021-08-21 13:30:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 837 transitions. [2021-08-21 13:30:50,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:30:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 837 transitions. [2021-08-21 13:30:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:50,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:50,953 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 13:30:50,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 13:30:51,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:51,154 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash 333773419, now seen corresponding path program 107 times [2021-08-21 13:30:51,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:51,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101567899] [2021-08-21 13:30:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:51,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:51,559 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 13:30:51,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:51,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101567899] [2021-08-21 13:30:51,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101567899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:51,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188434157] [2021-08-21 13:30:51,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:30:51,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:51,560 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:51,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 13:30:57,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:30:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:30:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:57,631 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 13:30:58,079 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 13:30:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188434157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:58,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:58,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 13:30:58,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715916268] [2021-08-21 13:30:58,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:30:58,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:30:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:30:58,080 INFO L87 Difference]: Start difference. First operand 416 states and 837 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:30:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:59,566 INFO L93 Difference]: Finished difference Result 672 states and 1322 transitions. [2021-08-21 13:30:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:30:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:30:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:59,567 INFO L225 Difference]: With dead ends: 672 [2021-08-21 13:30:59,567 INFO L226 Difference]: Without dead ends: 637 [2021-08-21 13:30:59,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1325.3ms TimeCoverageRelationStatistics Valid=325, Invalid=3335, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:30:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-08-21 13:30:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 406. [2021-08-21 13:30:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 13:30:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-08-21 13:30:59,573 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-08-21 13:30:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:59,573 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-08-21 13:30:59,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:30:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-08-21 13:30:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:30:59,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:59,573 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 13:30:59,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:59,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:59,774 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:30:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -296646989, now seen corresponding path program 108 times [2021-08-21 13:30:59,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:59,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821023086] [2021-08-21 13:30:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:59,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:00,200 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 13:31:00,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:00,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821023086] [2021-08-21 13:31:00,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821023086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:00,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293957608] [2021-08-21 13:31:00,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:31:00,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:00,202 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:00,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 13:31:06,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:31:06,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:06,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:31:06,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:06,473 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 13:31:06,880 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 13:31:06,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293957608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:06,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:06,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:31:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651655845] [2021-08-21 13:31:06,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:31:06,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:06,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:31:06,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:31:06,881 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:07,953 INFO L93 Difference]: Finished difference Result 582 states and 1141 transitions. [2021-08-21 13:31:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:31:07,953 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:31:07,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:07,954 INFO L225 Difference]: With dead ends: 582 [2021-08-21 13:31:07,954 INFO L226 Difference]: Without dead ends: 573 [2021-08-21 13:31:07,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1008.0ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:31:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-08-21 13:31:07,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 408. [2021-08-21 13:31:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.004914004914005) internal successors, (816), 407 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 13:31:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 816 transitions. [2021-08-21 13:31:07,959 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 816 transitions. Word has length 30 [2021-08-21 13:31:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:07,960 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 816 transitions. [2021-08-21 13:31:07,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 816 transitions. [2021-08-21 13:31:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:31:07,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:07,961 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 13:31:07,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 13:31:08,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:08,165 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:31:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:08,165 INFO L82 PathProgramCache]: Analyzing trace with hash 585418735, now seen corresponding path program 109 times [2021-08-21 13:31:08,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:08,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631348123] [2021-08-21 13:31:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:08,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:08,635 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 13:31:08,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:08,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631348123] [2021-08-21 13:31:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631348123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:08,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253953247] [2021-08-21 13:31:08,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:31:08,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:08,637 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:08,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 13:31:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:31:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:14,819 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 13:31:15,233 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 13:31:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253953247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:15,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:15,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:31:15,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523368583] [2021-08-21 13:31:15,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:31:15,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:31:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:31:15,234 INFO L87 Difference]: Start difference. First operand 408 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:16,427 INFO L93 Difference]: Finished difference Result 494 states and 979 transitions. [2021-08-21 13:31:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:31:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:31:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:16,428 INFO L225 Difference]: With dead ends: 494 [2021-08-21 13:31:16,428 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 13:31:16,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1178.8ms TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:31:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 13:31:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 398. [2021-08-21 13:31:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.017632241813602) internal successors, (801), 397 states have internal predecessors, (801), 0 states have call successors, (0), 0 states 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 13:31:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 801 transitions. [2021-08-21 13:31:16,432 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 801 transitions. Word has length 30 [2021-08-21 13:31:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:16,432 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 801 transitions. [2021-08-21 13:31:16,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 801 transitions. [2021-08-21 13:31:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:31:16,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:16,433 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 13:31:16,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:16,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:16,633 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:31:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -292588915, now seen corresponding path program 110 times [2021-08-21 13:31:16,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:16,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714130192] [2021-08-21 13:31:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:16,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:17,100 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 13:31:17,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:17,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714130192] [2021-08-21 13:31:17,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714130192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:17,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461467247] [2021-08-21 13:31:17,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:31:17,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:17,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:17,101 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:17,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 13:31:22,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:31:22,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:22,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:31:22,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:23,235 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 13:31:23,664 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 13:31:23,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461467247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:23,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:23,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:31:23,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677696847] [2021-08-21 13:31:23,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:31:23,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:23,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:31:23,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:31:23,665 INFO L87 Difference]: Start difference. First operand 398 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:24,765 INFO L93 Difference]: Finished difference Result 587 states and 1160 transitions. [2021-08-21 13:31:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:31:24,765 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:31:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:24,766 INFO L225 Difference]: With dead ends: 587 [2021-08-21 13:31:24,766 INFO L226 Difference]: Without dead ends: 554 [2021-08-21 13:31:24,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1126.6ms TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:31:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-08-21 13:31:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 395. [2021-08-21 13:31:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.020304568527919) internal successors, (796), 394 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 796 transitions. [2021-08-21 13:31:24,771 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 796 transitions. Word has length 30 [2021-08-21 13:31:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:24,771 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 796 transitions. [2021-08-21 13:31:24,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 796 transitions. [2021-08-21 13:31:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:31:24,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:24,771 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 13:31:24,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 13:31:24,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 13:31:24,972 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:31:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 193548589, now seen corresponding path program 111 times [2021-08-21 13:31:24,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:24,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31738366] [2021-08-21 13:31:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:24,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:25,383 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 13:31:25,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:25,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31738366] [2021-08-21 13:31:25,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31738366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:25,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539884123] [2021-08-21 13:31:25,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:31:25,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:25,385 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:25,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 13:31:31,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:31:31,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:31,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:31:31,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:31,642 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 13:31:32,073 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 13:31:32,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539884123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:32,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:32,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:31:32,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245766927] [2021-08-21 13:31:32,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:31:32,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:31:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:31:32,074 INFO L87 Difference]: Start difference. First operand 395 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:33,010 INFO L93 Difference]: Finished difference Result 570 states and 1116 transitions. [2021-08-21 13:31:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:31:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:31:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:33,011 INFO L225 Difference]: With dead ends: 570 [2021-08-21 13:31:33,011 INFO L226 Difference]: Without dead ends: 561 [2021-08-21 13:31:33,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 976.2ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:31:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-21 13:31:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 409. [2021-08-21 13:31:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.014705882352941) internal successors, (822), 408 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 13:31:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 822 transitions. [2021-08-21 13:31:33,016 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 822 transitions. Word has length 30 [2021-08-21 13:31:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:33,016 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 822 transitions. [2021-08-21 13:31:33,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 822 transitions. [2021-08-21 13:31:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:31:33,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:33,017 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 13:31:33,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:33,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 13:31:33,217 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:31:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1075614313, now seen corresponding path program 112 times [2021-08-21 13:31:33,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:33,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725536440] [2021-08-21 13:31:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:33,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:33,627 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 13:31:33,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:33,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725536440] [2021-08-21 13:31:33,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725536440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:33,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189825469] [2021-08-21 13:31:33,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:31:33,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:33,645 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:33,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 13:31:39,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:31:39,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:39,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:31:39,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:39,936 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 13:31:40,389 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 13:31:40,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189825469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:40,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:40,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:31:40,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158821953] [2021-08-21 13:31:40,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:31:40,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:31:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:31:40,391 INFO L87 Difference]: Start difference. First operand 409 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:41,573 INFO L93 Difference]: Finished difference Result 501 states and 993 transitions. [2021-08-21 13:31:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:31:41,574 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:31:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:41,574 INFO L225 Difference]: With dead ends: 501 [2021-08-21 13:31:41,574 INFO L226 Difference]: Without dead ends: 486 [2021-08-21 13:31:41,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1126.6ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:31:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-21 13:31:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 407. [2021-08-21 13:31:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 13:31:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-08-21 13:31:41,579 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-08-21 13:31:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-08-21 13:31:41,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-08-21 13:31:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:31:41,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:41,579 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 13:31:41,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:41,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:41,780 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:31:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1750686265, now seen corresponding path program 113 times [2021-08-21 13:31:41,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:41,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132307476] [2021-08-21 13:31:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:41,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:42,180 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 13:31:42,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:42,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132307476] [2021-08-21 13:31:42,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132307476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:42,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108394136] [2021-08-21 13:31:42,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:31:42,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:42,181 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:42,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 13:31:48,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:31:48,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:48,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:31:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:48,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:31:48,884 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 13:31:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108394136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:48,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:48,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-21 13:31:48,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329285850] [2021-08-21 13:31:48,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:31:48,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:31:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:31:48,885 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:31:49,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:49,877 INFO L93 Difference]: Finished difference Result 577 states and 1136 transitions. [2021-08-21 13:31:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:31:49,877 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-08-21 13:31:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:49,878 INFO L225 Difference]: With dead ends: 577 [2021-08-21 13:31:49,878 INFO L226 Difference]: Without dead ends: 532 [2021-08-21 13:31:49,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 897.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:31:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-21 13:31:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 399. [2021-08-21 13:31:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0150753768844223) internal successors, (802), 398 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 13:31:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 802 transitions. [2021-08-21 13:31:49,882 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 802 transitions. Word has length 30 [2021-08-21 13:31:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:49,882 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 802 transitions. [2021-08-21 13:31:49,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 13:31:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 802 transitions. [2021-08-21 13:31:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:31:49,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:49,883 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 13:31:49,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 13:31:50,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 13:31:50,084 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:31:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash 197606663, now seen corresponding path program 114 times [2021-08-21 13:31:50,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:50,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198974180] [2021-08-21 13:31:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:50,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:50,476 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 13:31:50,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:50,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198974180] [2021-08-21 13:31:50,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198974180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:50,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212567815] [2021-08-21 13:31:50,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:31:50,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:50,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:50,478 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:50,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 13:31:56,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:31:56,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:56,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:31:56,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:56,857 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 13:31:57,259 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 13:31:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212567815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:57,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:57,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:31:57,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033981897] [2021-08-21 13:31:57,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:31:57,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:31:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:31:57,261 INFO L87 Difference]: Start difference. First operand 399 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:58,111 INFO L93 Difference]: Finished difference Result 560 states and 1105 transitions. [2021-08-21 13:31:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:31:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:31:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:58,112 INFO L225 Difference]: With dead ends: 560 [2021-08-21 13:31:58,112 INFO L226 Difference]: Without dead ends: 527 [2021-08-21 13:31:58,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 945.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:31:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-21 13:31:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 397. [2021-08-21 13:31:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.015151515151515) internal successors, (798), 396 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 13:31:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 798 transitions. [2021-08-21 13:31:58,117 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 798 transitions. Word has length 30 [2021-08-21 13:31:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 798 transitions. [2021-08-21 13:31:58,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:31:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 798 transitions. [2021-08-21 13:31:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:31:58,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:58,118 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 13:31:58,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 13:31:58,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 13:31:58,325 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:31:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2141902077, now seen corresponding path program 115 times [2021-08-21 13:31:58,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:58,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343363974] [2021-08-21 13:31:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:58,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:58,738 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 13:31:58,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:58,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343363974] [2021-08-21 13:31:58,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343363974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:58,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049893262] [2021-08-21 13:31:58,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:31:58,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:58,740 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:58,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 13:32:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:32:04,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:05,189 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 13:32:05,629 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 13:32:05,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049893262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:05,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:05,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-08-21 13:32:05,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749972682] [2021-08-21 13:32:05,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:32:05,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:32:05,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:32:05,630 INFO L87 Difference]: Start difference. First operand 397 states and 798 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:32:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:06,642 INFO L93 Difference]: Finished difference Result 561 states and 1106 transitions. [2021-08-21 13:32:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:32:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-08-21 13:32:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:06,643 INFO L225 Difference]: With dead ends: 561 [2021-08-21 13:32:06,643 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 13:32:06,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1030.8ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:32:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 13:32:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 394. [2021-08-21 13:32:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states 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 13:32:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 793 transitions. [2021-08-21 13:32:06,649 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 793 transitions. Word has length 30 [2021-08-21 13:32:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:06,649 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 793 transitions. [2021-08-21 13:32:06,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 13:32:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 793 transitions. [2021-08-21 13:32:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:32:06,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:06,649 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 13:32:06,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:06,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 13:32:06,853 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:32:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1485056713, now seen corresponding path program 116 times [2021-08-21 13:32:06,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:06,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008265616] [2021-08-21 13:32:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:06,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:07,318 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 13:32:07,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008265616] [2021-08-21 13:32:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008265616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540100730] [2021-08-21 13:32:07,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:32:07,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:07,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:07,320 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:07,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 13:32:13,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:32:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:32:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:13,769 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 13:32:14,137 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 13:32:14,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540100730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:14,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:14,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 13:32:14,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816008416] [2021-08-21 13:32:14,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:32:14,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:32:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:32:14,138 INFO L87 Difference]: Start difference. First operand 394 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:32:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:15,209 INFO L93 Difference]: Finished difference Result 588 states and 1145 transitions. [2021-08-21 13:32:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:32:15,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-08-21 13:32:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:15,210 INFO L225 Difference]: With dead ends: 588 [2021-08-21 13:32:15,210 INFO L226 Difference]: Without dead ends: 579 [2021-08-21 13:32:15,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1008.6ms TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:32:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-21 13:32:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 423. [2021-08-21 13:32:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.0118483412322274) internal successors, (849), 422 states have internal predecessors, (849), 0 states have call successors, (0), 0 states 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 13:32:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 849 transitions. [2021-08-21 13:32:15,215 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 849 transitions. Word has length 30 [2021-08-21 13:32:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:15,216 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 849 transitions. [2021-08-21 13:32:15,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 13:32:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 849 transitions. [2021-08-21 13:32:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 13:32:15,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:15,216 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 13:32:15,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 13:32:15,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 13:32:15,418 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:32:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash -602990989, now seen corresponding path program 117 times [2021-08-21 13:32:15,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:15,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035135570] [2021-08-21 13:32:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:15,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:15,846 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 13:32:15,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:15,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035135570] [2021-08-21 13:32:15,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035135570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:15,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527717491] [2021-08-21 13:32:15,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:32:15,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:15,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:15,848 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:15,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 13:32:17,663 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:32:17,663 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:32:18,682 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:32:18,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:18,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 13:32:18,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:18,884 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while executing Executor. [2021-08-21 13:32:18,885 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:32:18,885 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:32:18,889 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:32:18,889 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:32:18,891 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:32:18 BasicIcfg [2021-08-21 13:32:18,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:32:18,892 INFO L168 Benchmark]: Toolchain (without parser) took 698337.89 ms. Allocated memory was 196.1 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 176.6 MB in the beginning and 542.4 MB in the end (delta: -365.9 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 13:32:18,892 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 177.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:32:18,892 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.81 ms. Allocated memory is still 196.1 MB. Free memory was 176.4 MB in the beginning and 175.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:32:18,893 INFO L168 Benchmark]: Boogie Preprocessor took 19.98 ms. Allocated memory is still 196.1 MB. Free memory was 174.9 MB in the beginning and 174.0 MB in the end (delta: 911.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:32:18,893 INFO L168 Benchmark]: RCFGBuilder took 359.80 ms. Allocated memory is still 196.1 MB. Free memory was 174.0 MB in the beginning and 160.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:32:18,893 INFO L168 Benchmark]: TraceAbstraction took 697924.90 ms. Allocated memory was 196.1 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 160.0 MB in the beginning and 542.4 MB in the end (delta: -382.5 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 13:32:18,894 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 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 177.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.81 ms. Allocated memory is still 196.1 MB. Free memory was 176.4 MB in the beginning and 175.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.98 ms. Allocated memory is still 196.1 MB. Free memory was 174.9 MB in the beginning and 174.0 MB in the end (delta: 911.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 359.80 ms. Allocated memory is still 196.1 MB. Free memory was 174.0 MB in the beginning and 160.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 697924.90 ms. Allocated memory was 196.1 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 160.0 MB in the beginning and 542.4 MB in the end (delta: -382.5 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 31 with TraceHistMax 2,while executing Executor. - 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 31 with TraceHistMax 2,while executing Executor. - 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 31 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 697798.3ms, OverallIterations: 130, TraceHistogramMax: 2, EmptinessCheckTime: 106.7ms, AutomataDifference: 143902.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6522 SDtfs, 14165 SDslu, 75943 SDs, 0 SdLazy, 133860 SolverSat, 5201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50947.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8143 GetRequests, 2010 SyntacticMatches, 145 SemanticMatches, 5988 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78360 ImplicationChecksByTransitivity, 142880.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=423occurred in iteration=129, InterpolantAutomatonStates: 3810, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 771.3ms AutomataMinimizationTime, 129 MinimizatonAttempts, 16387 StatesRemovedByMinimization, 127 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 479.5ms SsaConstructionTime, 1981.4ms SatisfiabilityAnalysisTime, 135346.1ms InterpolantComputationTime, 7433 NumberOfCodeBlocks, 7433 NumberOfCodeBlocksAsserted, 370 NumberOfCheckSat, 7178 ConstructedInterpolants, 0 QuantifiedInterpolants, 118040 SizeOfPredicates, 1193 NumberOfNonLiveVariables, 8483 ConjunctsInSsa, 3794 ConjunctsInUnsatCore, 255 InterpolantComputations, 3 PerfectInterpolantSequences, 8/1872 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