/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/chl/array-int-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:13:52,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:13:52,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:13:52,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:13:52,129 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 12:13:52,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:13:52,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:13:52,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:13:52,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:13:52,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:13:52,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:13:52,166 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:13:52,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:13:52,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:13:52,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:13:52,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:13:52,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:13:52,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:13:52,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:13:52,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:13:52,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:13:52,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:13:52,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:13:52,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:13:52,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:13:52,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:13:52,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:13:52,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:13:52,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:13:52,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:13:52,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:13:52,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:13:52,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:13:52,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:13:52,170 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:13:52,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:13:52,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:13:52,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:13:52,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:13:52,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:13:52,496 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:13:52,498 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:13:52,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl [2021-08-21 12:13:52,516 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl' [2021-08-21 12:13:52,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:13:52,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:13:52,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:13:52,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:13:52,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:13:52,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:13:52,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:13:52,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:13:52,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:13:52,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:13:52,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:13:52,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:13:52,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:13:52,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/1) ... [2021-08-21 12:13:52,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:13:52,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:52,651 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 12:13:52,667 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 12:13:52,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:13:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:13:52,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:13:52,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:13:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:13:52,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:13:52,687 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:13:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:13:52,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:13:52,687 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:13:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:13:52,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:13:52,688 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 12:13:52,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:13:52,965 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 12:13:52,965 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 12:13:52,966 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 12:13:52,966 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-21 12:13:52,967 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:13:52 BoogieIcfgContainer [2021-08-21 12:13:52,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:13:52,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:13:52,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:13:52,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:13:52,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:13:52" (1/2) ... [2021-08-21 12:13:52,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4607eff8 and model type array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:13:52, skipping insertion in model container [2021-08-21 12:13:52,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:13:52" (2/2) ... [2021-08-21 12:13:52,973 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-trans.wvr.bpl [2021-08-21 12:13:52,995 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:13:52,995 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:13:52,995 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:13:52,995 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:13:53,058 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:13:53,093 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:13:53,099 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 12:13:53,099 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:13:53,109 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-08-21 12:13:53,133 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:13:53,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:53,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:53,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2084038676, now seen corresponding path program 1 times [2021-08-21 12:13:53,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:53,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325413855] [2021-08-21 12:13:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:53,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:53,408 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 12:13:53,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:53,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325413855] [2021-08-21 12:13:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325413855] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:53,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:53,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:13:53,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130218606] [2021-08-21 12:13:53,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:13:53,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:13:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:13:53,432 INFO L87 Difference]: Start difference. First operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:53,575 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-08-21 12:13:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:13:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:13:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:53,597 INFO L225 Difference]: With dead ends: 139 [2021-08-21 12:13:53,597 INFO L226 Difference]: Without dead ends: 135 [2021-08-21 12:13:53,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-21 12:13:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-08-21 12:13:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-08-21 12:13:53,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-08-21 12:13:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:53,654 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-08-21 12:13:53,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-08-21 12:13:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:13:53,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:53,659 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:53,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:13:53,660 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:53,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1063699516, now seen corresponding path program 2 times [2021-08-21 12:13:53,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:53,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505587898] [2021-08-21 12:13:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:53,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:53,741 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 12:13:53,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:53,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505587898] [2021-08-21 12:13:53,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505587898] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:53,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:53,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:13:53,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314303100] [2021-08-21 12:13:53,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:13:53,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:53,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:13:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:13:53,752 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:53,859 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-08-21 12:13:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:13:53,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:13:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:53,862 INFO L225 Difference]: With dead ends: 156 [2021-08-21 12:13:53,862 INFO L226 Difference]: Without dead ends: 152 [2021-08-21 12:13:53,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-21 12:13:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-08-21 12:13:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-08-21 12:13:53,882 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-08-21 12:13:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:53,883 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-08-21 12:13:53,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-08-21 12:13:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:13:53,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:53,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:53,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:13:53,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash 285001590, now seen corresponding path program 3 times [2021-08-21 12:13:53,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:53,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489905856] [2021-08-21 12:13:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:53,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:53,949 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 12:13:53,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:53,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489905856] [2021-08-21 12:13:53,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489905856] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:53,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:53,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:13:53,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896936509] [2021-08-21 12:13:53,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:13:53,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:13:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:13:53,952 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:54,033 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-08-21 12:13:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:13:54,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:13:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:54,038 INFO L225 Difference]: With dead ends: 169 [2021-08-21 12:13:54,043 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 12:13:54,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 12:13:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-08-21 12:13:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-08-21 12:13:54,058 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-08-21 12:13:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:54,058 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-08-21 12:13:54,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-08-21 12:13:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:13:54,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:54,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:54,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:13:54,060 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash -791696276, now seen corresponding path program 4 times [2021-08-21 12:13:54,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:54,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062457510] [2021-08-21 12:13:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:54,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:54,112 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 12:13:54,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:54,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062457510] [2021-08-21 12:13:54,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062457510] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:54,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:54,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:13:54,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897118804] [2021-08-21 12:13:54,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:13:54,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:54,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:13:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:13:54,119 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:54,201 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-08-21 12:13:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:13:54,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:13:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:54,204 INFO L225 Difference]: With dead ends: 173 [2021-08-21 12:13:54,204 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 12:13:54,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 12:13:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-08-21 12:13:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-08-21 12:13:54,218 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-08-21 12:13:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:54,218 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-08-21 12:13:54,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-08-21 12:13:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:13:54,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:54,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:54,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:13:54,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:54,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1403389292, now seen corresponding path program 5 times [2021-08-21 12:13:54,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:54,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653152880] [2021-08-21 12:13:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:54,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:54,282 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 12:13:54,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:54,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653152880] [2021-08-21 12:13:54,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653152880] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:54,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:54,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:13:54,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080438899] [2021-08-21 12:13:54,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:13:54,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:13:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:13:54,285 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:54,379 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-08-21 12:13:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:13:54,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:13:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:54,381 INFO L225 Difference]: With dead ends: 176 [2021-08-21 12:13:54,381 INFO L226 Difference]: Without dead ends: 172 [2021-08-21 12:13:54,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-21 12:13:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-08-21 12:13:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-21 12:13:54,389 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-08-21 12:13:54,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:54,390 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-21 12:13:54,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-21 12:13:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:13:54,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:54,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:54,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:13:54,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904610, now seen corresponding path program 6 times [2021-08-21 12:13:54,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:54,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554786145] [2021-08-21 12:13:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:54,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:54,451 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 12:13:54,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:54,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554786145] [2021-08-21 12:13:54,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554786145] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:54,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:54,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:13:54,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152437623] [2021-08-21 12:13:54,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:13:54,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:13:54,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:13:54,455 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:54,542 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-08-21 12:13:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:13:54,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:13:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:54,544 INFO L225 Difference]: With dead ends: 174 [2021-08-21 12:13:54,545 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 12:13:54,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 12:13:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-08-21 12:13:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-21 12:13:54,554 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-08-21 12:13:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:54,554 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-21 12:13:54,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-21 12:13:54,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:54,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:54,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:54,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:13:54,555 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:54,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1483068478, now seen corresponding path program 1 times [2021-08-21 12:13:54,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:54,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279184324] [2021-08-21 12:13:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:54,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:54,700 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 12:13:54,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:54,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279184324] [2021-08-21 12:13:54,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279184324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:54,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439952344] [2021-08-21 12:13:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:54,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:54,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:54,702 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 12:13:54,704 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 12:13:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:55,002 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 12:13:55,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439952344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:55,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:55,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:13:55,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606668454] [2021-08-21 12:13:55,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:55,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:55,005 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:55,124 INFO L93 Difference]: Finished difference Result 179 states and 476 transitions. [2021-08-21 12:13:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:13:55,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:55,126 INFO L225 Difference]: With dead ends: 179 [2021-08-21 12:13:55,126 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 12:13:55,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 12:13:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-08-21 12:13:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.8214285714285716) internal successors, (316), 112 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 316 transitions. [2021-08-21 12:13:55,131 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 316 transitions. Word has length 15 [2021-08-21 12:13:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:55,132 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 316 transitions. [2021-08-21 12:13:55,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 316 transitions. [2021-08-21 12:13:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:55,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:55,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:55,160 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 12:13:55,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:55,349 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:55,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:55,349 INFO L82 PathProgramCache]: Analyzing trace with hash -181850573, now seen corresponding path program 1 times [2021-08-21 12:13:55,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:55,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997028870] [2021-08-21 12:13:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:55,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:55,463 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 12:13:55,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:55,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997028870] [2021-08-21 12:13:55,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997028870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:55,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920802512] [2021-08-21 12:13:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:55,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:55,465 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 12:13:55,482 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 12:13:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:55,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:55,822 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 12:13:55,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920802512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:55,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:55,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:13:55,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689640453] [2021-08-21 12:13:55,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:55,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:55,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:55,824 INFO L87 Difference]: Start difference. First operand 113 states and 316 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:55,985 INFO L93 Difference]: Finished difference Result 173 states and 446 transitions. [2021-08-21 12:13:55,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:55,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:55,988 INFO L225 Difference]: With dead ends: 173 [2021-08-21 12:13:55,988 INFO L226 Difference]: Without dead ends: 150 [2021-08-21 12:13:55,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-21 12:13:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2021-08-21 12:13:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8073394495412844) internal successors, (306), 109 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 306 transitions. [2021-08-21 12:13:55,993 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 306 transitions. Word has length 15 [2021-08-21 12:13:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:55,993 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 306 transitions. [2021-08-21 12:13:55,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 306 transitions. [2021-08-21 12:13:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:55,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:55,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:56,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 12:13:56,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-21 12:13:56,209 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1386214429, now seen corresponding path program 2 times [2021-08-21 12:13:56,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:56,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104845052] [2021-08-21 12:13:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:56,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:56,290 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 12:13:56,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:56,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104845052] [2021-08-21 12:13:56,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104845052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:56,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106094897] [2021-08-21 12:13:56,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:56,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:56,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:56,293 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 12:13:56,333 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 12:13:56,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:56,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:56,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:56,590 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 12:13:56,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106094897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:56,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:56,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:56,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997678806] [2021-08-21 12:13:56,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:56,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:56,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:56,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:56,594 INFO L87 Difference]: Start difference. First operand 110 states and 306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:56,793 INFO L93 Difference]: Finished difference Result 193 states and 494 transitions. [2021-08-21 12:13:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:56,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:56,795 INFO L225 Difference]: With dead ends: 193 [2021-08-21 12:13:56,795 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 12:13:56,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 12:13:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2021-08-21 12:13:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.76271186440678) internal successors, (326), 118 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 326 transitions. [2021-08-21 12:13:56,801 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 326 transitions. Word has length 15 [2021-08-21 12:13:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:56,801 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 326 transitions. [2021-08-21 12:13:56,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 326 transitions. [2021-08-21 12:13:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:56,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:56,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:56,831 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 12:13:57,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:57,027 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash -791556719, now seen corresponding path program 3 times [2021-08-21 12:13:57,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:57,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17111547] [2021-08-21 12:13:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:57,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:57,092 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 12:13:57,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17111547] [2021-08-21 12:13:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17111547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331661904] [2021-08-21 12:13:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:57,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:57,094 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 12:13:57,105 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 12:13:57,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:13:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:57,286 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 12:13:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331661904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:57,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-21 12:13:57,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343157650] [2021-08-21 12:13:57,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:57,288 INFO L87 Difference]: Start difference. First operand 119 states and 326 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:13:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:57,840 INFO L93 Difference]: Finished difference Result 240 states and 644 transitions. [2021-08-21 12:13:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:13:57,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 15 [2021-08-21 12:13:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:57,843 INFO L225 Difference]: With dead ends: 240 [2021-08-21 12:13:57,844 INFO L226 Difference]: Without dead ends: 188 [2021-08-21 12:13:57,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:13:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-21 12:13:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-08-21 12:13:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8584070796460175) internal successors, (323), 113 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 12:13:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-08-21 12:13:57,851 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 15 [2021-08-21 12:13:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:57,852 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-08-21 12:13:57,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:13:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-08-21 12:13:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:57,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:57,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:57,880 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 12:13:58,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:58,072 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 479878778, now seen corresponding path program 1 times [2021-08-21 12:13:58,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:58,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373860407] [2021-08-21 12:13:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:58,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:58,136 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 12:13:58,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:58,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373860407] [2021-08-21 12:13:58,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373860407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:58,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012379776] [2021-08-21 12:13:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:58,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:58,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:58,141 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 12:13:58,142 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 12:13:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:58,355 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 12:13:58,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012379776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:58,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:58,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:13:58,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122329326] [2021-08-21 12:13:58,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:58,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:58,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:58,357 INFO L87 Difference]: Start difference. First operand 114 states and 323 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:58,515 INFO L93 Difference]: Finished difference Result 191 states and 526 transitions. [2021-08-21 12:13:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:58,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:58,517 INFO L225 Difference]: With dead ends: 191 [2021-08-21 12:13:58,517 INFO L226 Difference]: Without dead ends: 186 [2021-08-21 12:13:58,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-21 12:13:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2021-08-21 12:13:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.909090909090909) internal successors, (352), 121 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 352 transitions. [2021-08-21 12:13:58,522 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 352 transitions. Word has length 15 [2021-08-21 12:13:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:58,522 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 352 transitions. [2021-08-21 12:13:58,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 352 transitions. [2021-08-21 12:13:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:58,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:58,523 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:58,548 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 12:13:58,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:13:58,744 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1061697008, now seen corresponding path program 2 times [2021-08-21 12:13:58,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:58,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246161550] [2021-08-21 12:13:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:58,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:58,824 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 12:13:58,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:58,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246161550] [2021-08-21 12:13:58,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246161550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:58,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369435276] [2021-08-21 12:13:58,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:58,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:58,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:58,826 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 12:13:58,858 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 12:13:58,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:58,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:58,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:59,040 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 12:13:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369435276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:59,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:59,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:13:59,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32840986] [2021-08-21 12:13:59,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:59,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:59,042 INFO L87 Difference]: Start difference. First operand 122 states and 352 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:59,323 INFO L93 Difference]: Finished difference Result 222 states and 617 transitions. [2021-08-21 12:13:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:59,324 INFO L225 Difference]: With dead ends: 222 [2021-08-21 12:13:59,325 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 12:13:59,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:13:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 12:13:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-08-21 12:13:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.937007874015748) internal successors, (373), 127 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 373 transitions. [2021-08-21 12:13:59,330 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 373 transitions. Word has length 15 [2021-08-21 12:13:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:59,330 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 373 transitions. [2021-08-21 12:13:59,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 373 transitions. [2021-08-21 12:13:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:59,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:59,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:59,357 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 12:13:59,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:59,541 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash 425737754, now seen corresponding path program 2 times [2021-08-21 12:13:59,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:59,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298270655] [2021-08-21 12:13:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:59,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:59,601 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 12:13:59,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:59,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298270655] [2021-08-21 12:13:59,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298270655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:59,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714300930] [2021-08-21 12:13:59,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:59,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:59,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:59,603 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 12:13:59,610 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 12:13:59,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:59,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:59,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:59,884 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 12:13:59,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714300930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:59,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:59,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 12:13:59,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636077841] [2021-08-21 12:13:59,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:59,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:59,886 INFO L87 Difference]: Start difference. First operand 128 states and 373 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:14:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:00,436 INFO L93 Difference]: Finished difference Result 285 states and 767 transitions. [2021-08-21 12:14:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:14:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 15 [2021-08-21 12:14:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:00,438 INFO L225 Difference]: With dead ends: 285 [2021-08-21 12:14:00,438 INFO L226 Difference]: Without dead ends: 246 [2021-08-21 12:14:00,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 449.7ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:14:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-21 12:14:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2021-08-21 12:14:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 434 transitions. [2021-08-21 12:14:00,445 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 434 transitions. Word has length 15 [2021-08-21 12:14:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:00,446 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 434 transitions. [2021-08-21 12:14:00,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:14:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 434 transitions. [2021-08-21 12:14:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:00,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:00,446 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:00,473 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 12:14:00,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:00,647 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:00,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1239181297, now seen corresponding path program 4 times [2021-08-21 12:14:00,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:00,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736459342] [2021-08-21 12:14:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:00,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:00,719 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 12:14:00,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:00,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736459342] [2021-08-21 12:14:00,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736459342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:00,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141327260] [2021-08-21 12:14:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:00,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:00,721 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 12:14:00,722 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 12:14:00,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:00,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:00,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:01,009 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 12:14:01,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141327260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:01,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:01,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:01,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900332402] [2021-08-21 12:14:01,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:01,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:01,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:01,012 INFO L87 Difference]: Start difference. First operand 143 states and 434 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:01,130 INFO L93 Difference]: Finished difference Result 240 states and 643 transitions. [2021-08-21 12:14:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:01,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:01,133 INFO L225 Difference]: With dead ends: 240 [2021-08-21 12:14:01,133 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:14:01,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:14:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-08-21 12:14:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-08-21 12:14:01,139 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 15 [2021-08-21 12:14:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:01,139 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-08-21 12:14:01,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-08-21 12:14:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:01,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:01,141 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:01,170 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 12:14:01,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:14:01,362 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1920533253, now seen corresponding path program 5 times [2021-08-21 12:14:01,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:01,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872830899] [2021-08-21 12:14:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:01,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:01,413 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 12:14:01,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:01,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872830899] [2021-08-21 12:14:01,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872830899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:01,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353588922] [2021-08-21 12:14:01,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:01,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:01,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:01,415 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 12:14:01,440 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 12:14:01,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:01,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:01,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:01,676 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 12:14:01,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353588922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:01,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:01,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:14:01,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344711714] [2021-08-21 12:14:01,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:01,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:01,677 INFO L87 Difference]: Start difference. First operand 145 states and 436 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:01,819 INFO L93 Difference]: Finished difference Result 226 states and 636 transitions. [2021-08-21 12:14:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:01,820 INFO L225 Difference]: With dead ends: 226 [2021-08-21 12:14:01,820 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 12:14:01,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 12:14:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-08-21 12:14:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-08-21 12:14:01,831 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 15 [2021-08-21 12:14:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:01,833 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-08-21 12:14:01,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-08-21 12:14:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:01,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:01,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:01,860 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 12:14:02,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:14:02,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 261809974, now seen corresponding path program 3 times [2021-08-21 12:14:02,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:02,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586258313] [2021-08-21 12:14:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:02,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:02,119 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 12:14:02,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:02,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586258313] [2021-08-21 12:14:02,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586258313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:02,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380702500] [2021-08-21 12:14:02,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:02,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:02,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:02,127 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 12:14:02,150 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 12:14:02,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:02,431 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 12:14:02,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380702500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:02,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:02,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:02,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382853836] [2021-08-21 12:14:02,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:02,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:02,432 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:02,588 INFO L93 Difference]: Finished difference Result 214 states and 602 transitions. [2021-08-21 12:14:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:02,590 INFO L225 Difference]: With dead ends: 214 [2021-08-21 12:14:02,590 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 12:14:02,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 12:14:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-08-21 12:14:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9419354838709677) internal successors, (456), 155 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 456 transitions. [2021-08-21 12:14:02,595 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 456 transitions. Word has length 15 [2021-08-21 12:14:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:02,595 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 456 transitions. [2021-08-21 12:14:02,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 456 transitions. [2021-08-21 12:14:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:02,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:02,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:02,622 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 12:14:02,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:14:02,797 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:02,797 INFO L82 PathProgramCache]: Analyzing trace with hash 969696957, now seen corresponding path program 6 times [2021-08-21 12:14:02,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:02,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581742009] [2021-08-21 12:14:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:02,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:02,886 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 12:14:02,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:02,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581742009] [2021-08-21 12:14:02,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581742009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:02,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660715915] [2021-08-21 12:14:02,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:02,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:02,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:02,887 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 12:14:02,888 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 12:14:03,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:03,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:03,226 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 12:14:03,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660715915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:03,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:03,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:03,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042115738] [2021-08-21 12:14:03,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:03,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:03,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:03,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:03,230 INFO L87 Difference]: Start difference. First operand 156 states and 456 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:03,357 INFO L93 Difference]: Finished difference Result 247 states and 666 transitions. [2021-08-21 12:14:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:03,360 INFO L225 Difference]: With dead ends: 247 [2021-08-21 12:14:03,360 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:14:03,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:14:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 162. [2021-08-21 12:14:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.9751552795031055) internal successors, (479), 161 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 479 transitions. [2021-08-21 12:14:03,367 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 479 transitions. Word has length 15 [2021-08-21 12:14:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:03,367 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 479 transitions. [2021-08-21 12:14:03,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 479 transitions. [2021-08-21 12:14:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:03,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:03,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:03,391 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 12:14:03,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:14:03,581 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash 511194826, now seen corresponding path program 4 times [2021-08-21 12:14:03,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:03,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769768986] [2021-08-21 12:14:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:03,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:03,661 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 12:14:03,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:03,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769768986] [2021-08-21 12:14:03,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769768986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:03,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466545094] [2021-08-21 12:14:03,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:03,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:03,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:03,674 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 12:14:03,675 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 12:14:03,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:03,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:04,016 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 12:14:04,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466545094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:04,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:04,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:04,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219248173] [2021-08-21 12:14:04,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:04,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:04,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:04,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:04,018 INFO L87 Difference]: Start difference. First operand 162 states and 479 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 12:14:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:04,181 INFO L93 Difference]: Finished difference Result 256 states and 722 transitions. [2021-08-21 12:14:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 15 [2021-08-21 12:14:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:04,184 INFO L225 Difference]: With dead ends: 256 [2021-08-21 12:14:04,184 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 12:14:04,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 12:14:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2021-08-21 12:14:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.9938650306748467) internal successors, (488), 163 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 488 transitions. [2021-08-21 12:14:04,190 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 488 transitions. Word has length 15 [2021-08-21 12:14:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:04,190 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 488 transitions. [2021-08-21 12:14:04,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 12:14:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 488 transitions. [2021-08-21 12:14:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:04,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:04,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:04,219 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 12:14:04,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:14:04,405 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1191253196, now seen corresponding path program 3 times [2021-08-21 12:14:04,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:04,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790148641] [2021-08-21 12:14:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:04,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:04,459 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 12:14:04,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:04,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790148641] [2021-08-21 12:14:04,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790148641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:04,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168694510] [2021-08-21 12:14:04,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:04,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:04,461 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 12:14:04,461 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 12:14:04,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:04,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:04,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:04,827 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 12:14:04,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168694510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:04,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:04,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 12:14:04,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995076307] [2021-08-21 12:14:04,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:04,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:04,830 INFO L87 Difference]: Start difference. First operand 164 states and 488 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:14:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:05,330 INFO L93 Difference]: Finished difference Result 266 states and 727 transitions. [2021-08-21 12:14:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:14:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 15 [2021-08-21 12:14:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:05,332 INFO L225 Difference]: With dead ends: 266 [2021-08-21 12:14:05,332 INFO L226 Difference]: Without dead ends: 227 [2021-08-21 12:14:05,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:14:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-08-21 12:14:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2021-08-21 12:14:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.975) internal successors, (476), 160 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 476 transitions. [2021-08-21 12:14:05,342 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 476 transitions. Word has length 15 [2021-08-21 12:14:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:05,342 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 476 transitions. [2021-08-21 12:14:05,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:14:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 476 transitions. [2021-08-21 12:14:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:05,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:05,343 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:05,369 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 12:14:05,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:05,563 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1872750932, now seen corresponding path program 5 times [2021-08-21 12:14:05,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:05,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610457954] [2021-08-21 12:14:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:05,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:05,631 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 12:14:05,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:05,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610457954] [2021-08-21 12:14:05,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610457954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:05,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121353128] [2021-08-21 12:14:05,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:05,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:05,633 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 12:14:05,633 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 12:14:05,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:05,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:05,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:05,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:06,010 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 12:14:06,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121353128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:06,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:06,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:06,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370880228] [2021-08-21 12:14:06,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:06,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:06,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:06,012 INFO L87 Difference]: Start difference. First operand 161 states and 476 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:06,146 INFO L93 Difference]: Finished difference Result 228 states and 646 transitions. [2021-08-21 12:14:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:06,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:06,148 INFO L225 Difference]: With dead ends: 228 [2021-08-21 12:14:06,148 INFO L226 Difference]: Without dead ends: 222 [2021-08-21 12:14:06,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-21 12:14:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 160. [2021-08-21 12:14:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9685534591194966) internal successors, (472), 159 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 472 transitions. [2021-08-21 12:14:06,154 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 472 transitions. Word has length 15 [2021-08-21 12:14:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:06,154 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 472 transitions. [2021-08-21 12:14:06,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 472 transitions. [2021-08-21 12:14:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:06,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:06,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:06,180 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 12:14:06,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:06,365 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:06,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1996868015, now seen corresponding path program 7 times [2021-08-21 12:14:06,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:06,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13111980] [2021-08-21 12:14:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:06,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:06,421 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 12:14:06,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:06,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13111980] [2021-08-21 12:14:06,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13111980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:06,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855258169] [2021-08-21 12:14:06,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:06,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:06,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:06,423 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 12:14:06,438 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 12:14:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:06,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:06,710 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 12:14:06,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855258169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:06,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:06,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 12:14:06,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513635453] [2021-08-21 12:14:06,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:06,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:06,713 INFO L87 Difference]: Start difference. First operand 160 states and 472 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:06,824 INFO L93 Difference]: Finished difference Result 262 states and 721 transitions. [2021-08-21 12:14:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:06,825 INFO L225 Difference]: With dead ends: 262 [2021-08-21 12:14:06,825 INFO L226 Difference]: Without dead ends: 242 [2021-08-21 12:14:06,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-21 12:14:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 170. [2021-08-21 12:14:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.035502958579882) internal successors, (513), 169 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 513 transitions. [2021-08-21 12:14:06,832 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 513 transitions. Word has length 15 [2021-08-21 12:14:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:06,832 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 513 transitions. [2021-08-21 12:14:06,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 513 transitions. [2021-08-21 12:14:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:06,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:06,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:06,860 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 12:14:07,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:07,053 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash 63857103, now seen corresponding path program 8 times [2021-08-21 12:14:07,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:07,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437848806] [2021-08-21 12:14:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:07,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:07,128 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 12:14:07,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:07,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437848806] [2021-08-21 12:14:07,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437848806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:07,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536765726] [2021-08-21 12:14:07,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:07,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:07,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:07,140 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 12:14:07,142 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 12:14:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:07,553 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 12:14:07,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536765726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:07,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:07,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:07,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814284082] [2021-08-21 12:14:07,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:07,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:07,555 INFO L87 Difference]: Start difference. First operand 170 states and 513 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:07,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:07,690 INFO L93 Difference]: Finished difference Result 235 states and 663 transitions. [2021-08-21 12:14:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:07,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:07,692 INFO L225 Difference]: With dead ends: 235 [2021-08-21 12:14:07,692 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:14:07,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:14:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2021-08-21 12:14:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.035928143712575) internal successors, (507), 167 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 507 transitions. [2021-08-21 12:14:07,698 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 507 transitions. Word has length 15 [2021-08-21 12:14:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:07,698 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 507 transitions. [2021-08-21 12:14:07,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 507 transitions. [2021-08-21 12:14:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:07,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:07,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:07,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:07,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 12:14:07,921 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1882931455, now seen corresponding path program 9 times [2021-08-21 12:14:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:07,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181670339] [2021-08-21 12:14:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:07,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:07,996 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 12:14:07,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:07,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181670339] [2021-08-21 12:14:07,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181670339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:07,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005429671] [2021-08-21 12:14:07,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:07,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:08,007 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 12:14:08,007 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 12:14:08,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:08,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:08,394 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 12:14:08,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005429671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:08,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:08,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:08,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017191000] [2021-08-21 12:14:08,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:08,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:08,395 INFO L87 Difference]: Start difference. First operand 168 states and 507 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:08,535 INFO L93 Difference]: Finished difference Result 297 states and 847 transitions. [2021-08-21 12:14:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:08,537 INFO L225 Difference]: With dead ends: 297 [2021-08-21 12:14:08,538 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 12:14:08,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:14:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 12:14:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 169. [2021-08-21 12:14:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0416666666666665) internal successors, (511), 168 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 511 transitions. [2021-08-21 12:14:08,543 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 511 transitions. Word has length 15 [2021-08-21 12:14:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:08,544 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 511 transitions. [2021-08-21 12:14:08,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 511 transitions. [2021-08-21 12:14:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:08,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:08,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:08,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:08,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:08,761 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:08,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1421752138, now seen corresponding path program 6 times [2021-08-21 12:14:08,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:08,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311925896] [2021-08-21 12:14:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:08,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:08,818 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 12:14:08,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:08,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311925896] [2021-08-21 12:14:08,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311925896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:08,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859653060] [2021-08-21 12:14:08,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:08,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:08,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:08,820 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 12:14:08,821 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 12:14:09,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:09,240 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 12:14:09,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859653060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:09,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:09,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 12:14:09,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799296180] [2021-08-21 12:14:09,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:09,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:09,241 INFO L87 Difference]: Start difference. First operand 169 states and 511 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 12:14:09,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:09,410 INFO L93 Difference]: Finished difference Result 298 states and 848 transitions. [2021-08-21 12:14:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:09,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 15 [2021-08-21 12:14:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:09,412 INFO L225 Difference]: With dead ends: 298 [2021-08-21 12:14:09,412 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 12:14:09,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 12:14:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2021-08-21 12:14:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 3.085227272727273) internal successors, (543), 176 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 543 transitions. [2021-08-21 12:14:09,419 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 543 transitions. Word has length 15 [2021-08-21 12:14:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:09,419 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 543 transitions. [2021-08-21 12:14:09,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 12:14:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 543 transitions. [2021-08-21 12:14:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:09,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:09,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:09,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:09,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:09,641 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash 463350691, now seen corresponding path program 10 times [2021-08-21 12:14:09,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:09,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263664956] [2021-08-21 12:14:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:09,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:09,740 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 12:14:09,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:09,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263664956] [2021-08-21 12:14:09,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263664956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:09,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174374537] [2021-08-21 12:14:09,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:09,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:09,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:09,742 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 12:14:09,743 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 12:14:09,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:09,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:09,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:10,173 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 12:14:10,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174374537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:10,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:10,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:10,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773451637] [2021-08-21 12:14:10,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:10,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:10,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:10,174 INFO L87 Difference]: Start difference. First operand 177 states and 543 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:10,298 INFO L93 Difference]: Finished difference Result 284 states and 814 transitions. [2021-08-21 12:14:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:10,300 INFO L225 Difference]: With dead ends: 284 [2021-08-21 12:14:10,300 INFO L226 Difference]: Without dead ends: 268 [2021-08-21 12:14:10,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-21 12:14:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 181. [2021-08-21 12:14:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.088888888888889) internal successors, (556), 180 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 556 transitions. [2021-08-21 12:14:10,317 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 556 transitions. Word has length 15 [2021-08-21 12:14:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:10,317 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 556 transitions. [2021-08-21 12:14:10,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 556 transitions. [2021-08-21 12:14:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:10,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:10,319 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:10,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 12:14:10,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:10,519 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1490521749, now seen corresponding path program 11 times [2021-08-21 12:14:10,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:10,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340776579] [2021-08-21 12:14:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:10,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:10,566 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 12:14:10,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:10,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340776579] [2021-08-21 12:14:10,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340776579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:10,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622117770] [2021-08-21 12:14:10,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:10,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:10,567 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 12:14:10,572 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 12:14:10,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:10,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:10,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:10,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:10,909 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 12:14:10,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622117770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:10,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:10,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:14:10,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471493126] [2021-08-21 12:14:10,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:10,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:10,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:10,910 INFO L87 Difference]: Start difference. First operand 181 states and 556 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:11,014 INFO L93 Difference]: Finished difference Result 236 states and 686 transitions. [2021-08-21 12:14:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:11,016 INFO L225 Difference]: With dead ends: 236 [2021-08-21 12:14:11,016 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:14:11,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:14:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 173. [2021-08-21 12:14:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0232558139534884) internal successors, (520), 172 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 520 transitions. [2021-08-21 12:14:11,022 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 520 transitions. Word has length 15 [2021-08-21 12:14:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:11,022 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 520 transitions. [2021-08-21 12:14:11,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 520 transitions. [2021-08-21 12:14:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:11,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:11,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:11,050 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 12:14:11,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:14:11,251 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:11,251 INFO L82 PathProgramCache]: Analyzing trace with hash -575624838, now seen corresponding path program 7 times [2021-08-21 12:14:11,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:11,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380121076] [2021-08-21 12:14:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:11,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:11,304 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 12:14:11,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:11,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380121076] [2021-08-21 12:14:11,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380121076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:11,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081561908] [2021-08-21 12:14:11,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:11,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:11,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:11,305 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 12:14:11,340 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 12:14:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:11,737 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 12:14:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081561908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:11,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:11,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:11,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220642198] [2021-08-21 12:14:11,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:11,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:11,739 INFO L87 Difference]: Start difference. First operand 173 states and 520 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:11,840 INFO L93 Difference]: Finished difference Result 224 states and 623 transitions. [2021-08-21 12:14:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:11,841 INFO L225 Difference]: With dead ends: 224 [2021-08-21 12:14:11,841 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:14:11,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:14:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 176. [2021-08-21 12:14:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.005714285714286) internal successors, (526), 175 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 526 transitions. [2021-08-21 12:14:11,846 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 526 transitions. Word has length 15 [2021-08-21 12:14:11,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:11,846 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 526 transitions. [2021-08-21 12:14:11,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:11,846 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 526 transitions. [2021-08-21 12:14:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:11,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:11,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:11,877 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 12:14:12,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:14:12,071 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:12,072 INFO L82 PathProgramCache]: Analyzing trace with hash -442489163, now seen corresponding path program 12 times [2021-08-21 12:14:12,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:12,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9920974] [2021-08-21 12:14:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:12,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:12,144 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 12:14:12,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:12,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9920974] [2021-08-21 12:14:12,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9920974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:12,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130292492] [2021-08-21 12:14:12,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:12,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:12,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:12,146 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 12:14:12,168 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 12:14:12,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:12,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:12,605 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 12:14:12,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130292492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:12,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:12,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:12,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340889980] [2021-08-21 12:14:12,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:12,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:12,606 INFO L87 Difference]: Start difference. First operand 176 states and 526 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:12,721 INFO L93 Difference]: Finished difference Result 259 states and 744 transitions. [2021-08-21 12:14:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:12,722 INFO L225 Difference]: With dead ends: 259 [2021-08-21 12:14:12,722 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:14:12,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:14:12,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 173. [2021-08-21 12:14:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.994186046511628) internal successors, (515), 172 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 515 transitions. [2021-08-21 12:14:12,728 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 515 transitions. Word has length 15 [2021-08-21 12:14:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:12,728 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 515 transitions. [2021-08-21 12:14:12,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 515 transitions. [2021-08-21 12:14:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:12,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:12,729 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:12,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:12,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:14:12,953 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 229088170, now seen corresponding path program 8 times [2021-08-21 12:14:12,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:12,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659340997] [2021-08-21 12:14:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:12,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:13,003 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 12:14:13,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:13,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659340997] [2021-08-21 12:14:13,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659340997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:13,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436221668] [2021-08-21 12:14:13,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:13,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:13,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:13,012 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 12:14:13,013 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 12:14:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:13,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:13,397 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 12:14:13,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436221668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:13,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:13,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:14:13,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631284218] [2021-08-21 12:14:13,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:13,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:13,399 INFO L87 Difference]: Start difference. First operand 173 states and 515 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:13,500 INFO L93 Difference]: Finished difference Result 210 states and 594 transitions. [2021-08-21 12:14:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:13,502 INFO L225 Difference]: With dead ends: 210 [2021-08-21 12:14:13,502 INFO L226 Difference]: Without dead ends: 186 [2021-08-21 12:14:13,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-21 12:14:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 168. [2021-08-21 12:14:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.970059880239521) internal successors, (496), 167 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 496 transitions. [2021-08-21 12:14:13,506 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 496 transitions. Word has length 15 [2021-08-21 12:14:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:13,507 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 496 transitions. [2021-08-21 12:14:13,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 496 transitions. [2021-08-21 12:14:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:13,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:13,507 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:13,535 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 12:14:13,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:13,727 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1908872692, now seen corresponding path program 4 times [2021-08-21 12:14:13,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:13,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844811642] [2021-08-21 12:14:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:13,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:13,770 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 12:14:13,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:13,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844811642] [2021-08-21 12:14:13,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844811642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:13,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985478762] [2021-08-21 12:14:13,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:13,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:13,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:13,785 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 12:14:13,787 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 12:14:14,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:14,157 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 12:14:14,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985478762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:14,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:14,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:14:14,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433608581] [2021-08-21 12:14:14,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:14,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:14,158 INFO L87 Difference]: Start difference. First operand 168 states and 496 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:14,232 INFO L93 Difference]: Finished difference Result 218 states and 624 transitions. [2021-08-21 12:14:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:14,234 INFO L225 Difference]: With dead ends: 218 [2021-08-21 12:14:14,234 INFO L226 Difference]: Without dead ends: 196 [2021-08-21 12:14:14,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-21 12:14:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 173. [2021-08-21 12:14:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.9651162790697674) internal successors, (510), 172 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 510 transitions. [2021-08-21 12:14:14,240 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 510 transitions. Word has length 15 [2021-08-21 12:14:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:14,240 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 510 transitions. [2021-08-21 12:14:14,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 510 transitions. [2021-08-21 12:14:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:14,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:14,241 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:14,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:14,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:14,449 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1726119319, now seen corresponding path program 13 times [2021-08-21 12:14:14,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:14,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424953869] [2021-08-21 12:14:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:14,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:14,504 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 12:14:14,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:14,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424953869] [2021-08-21 12:14:14,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424953869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:14,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352526838] [2021-08-21 12:14:14,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:14,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:14,509 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 12:14:14,510 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 12:14:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:14,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:14,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:14,924 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 12:14:14,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352526838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:14,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:14,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:14,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786547146] [2021-08-21 12:14:14,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:14,926 INFO L87 Difference]: Start difference. First operand 173 states and 510 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:15,051 INFO L93 Difference]: Finished difference Result 222 states and 593 transitions. [2021-08-21 12:14:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:15,052 INFO L225 Difference]: With dead ends: 222 [2021-08-21 12:14:15,052 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:14:15,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:14:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 170. [2021-08-21 12:14:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9822485207100593) internal successors, (504), 169 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 504 transitions. [2021-08-21 12:14:15,057 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 504 transitions. Word has length 15 [2021-08-21 12:14:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:15,057 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 504 transitions. [2021-08-21 12:14:15,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 504 transitions. [2021-08-21 12:14:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:15,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:15,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:15,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 12:14:15,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-21 12:14:15,273 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1450031912, now seen corresponding path program 5 times [2021-08-21 12:14:15,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:15,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502826690] [2021-08-21 12:14:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:15,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:15,315 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 12:14:15,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:15,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502826690] [2021-08-21 12:14:15,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502826690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:15,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984112961] [2021-08-21 12:14:15,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:15,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:15,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:15,320 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 12:14:15,321 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 12:14:15,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:15,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:15,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:15,743 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 12:14:15,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984112961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:15,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:15,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:14:15,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244163007] [2021-08-21 12:14:15,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:15,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:15,744 INFO L87 Difference]: Start difference. First operand 170 states and 504 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 12:14:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:16,017 INFO L93 Difference]: Finished difference Result 238 states and 662 transitions. [2021-08-21 12:14:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 15 [2021-08-21 12:14:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:16,019 INFO L225 Difference]: With dead ends: 238 [2021-08-21 12:14:16,019 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 12:14:16,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 12:14:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 163. [2021-08-21 12:14:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.9382716049382718) internal successors, (476), 162 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 476 transitions. [2021-08-21 12:14:16,024 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 476 transitions. Word has length 15 [2021-08-21 12:14:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:16,024 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 476 transitions. [2021-08-21 12:14:16,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 12:14:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 476 transitions. [2021-08-21 12:14:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:16,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:16,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:16,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 12:14:16,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 12:14:16,241 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -373737011, now seen corresponding path program 14 times [2021-08-21 12:14:16,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:16,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407319394] [2021-08-21 12:14:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:16,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:16,303 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 12:14:16,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:16,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407319394] [2021-08-21 12:14:16,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407319394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:16,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196580553] [2021-08-21 12:14:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:16,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:16,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:16,304 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 12:14:16,305 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 12:14:16,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:16,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:16,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:16,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:16,789 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 12:14:16,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196580553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:16,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:16,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:16,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176837237] [2021-08-21 12:14:16,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:16,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:16,790 INFO L87 Difference]: Start difference. First operand 163 states and 476 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:16,910 INFO L93 Difference]: Finished difference Result 235 states and 619 transitions. [2021-08-21 12:14:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:16,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:16,911 INFO L225 Difference]: With dead ends: 235 [2021-08-21 12:14:16,911 INFO L226 Difference]: Without dead ends: 222 [2021-08-21 12:14:16,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-21 12:14:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 166. [2021-08-21 12:14:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.9454545454545453) internal successors, (486), 165 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 486 transitions. [2021-08-21 12:14:16,917 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 486 transitions. Word has length 15 [2021-08-21 12:14:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:16,917 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 486 transitions. [2021-08-21 12:14:16,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:16,917 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 486 transitions. [2021-08-21 12:14:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:16,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:16,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:16,944 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 12:14:17,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:17,144 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1546992041, now seen corresponding path program 15 times [2021-08-21 12:14:17,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:17,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838589795] [2021-08-21 12:14:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:17,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:17,214 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 12:14:17,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:17,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838589795] [2021-08-21 12:14:17,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838589795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:17,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32138436] [2021-08-21 12:14:17,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:17,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:17,216 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 12:14:17,222 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 12:14:17,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:17,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:17,695 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 12:14:17,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32138436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:17,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:17,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:17,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694414801] [2021-08-21 12:14:17,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:17,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:17,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:17,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:17,697 INFO L87 Difference]: Start difference. First operand 166 states and 486 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:17,810 INFO L93 Difference]: Finished difference Result 220 states and 593 transitions. [2021-08-21 12:14:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:17,811 INFO L225 Difference]: With dead ends: 220 [2021-08-21 12:14:17,811 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 12:14:17,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 12:14:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 160. [2021-08-21 12:14:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.930817610062893) internal successors, (466), 159 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 466 transitions. [2021-08-21 12:14:17,815 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 466 transitions. Word has length 15 [2021-08-21 12:14:17,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:17,815 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 466 transitions. [2021-08-21 12:14:17,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 466 transitions. [2021-08-21 12:14:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:17,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:17,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:17,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 12:14:18,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:18,021 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash 738151264, now seen corresponding path program 6 times [2021-08-21 12:14:18,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:18,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011401400] [2021-08-21 12:14:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:18,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:18,059 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 12:14:18,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:18,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011401400] [2021-08-21 12:14:18,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011401400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:18,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853782459] [2021-08-21 12:14:18,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:18,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:18,060 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 12:14:18,061 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 12:14:18,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:18,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:18,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:18,455 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 12:14:18,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853782459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:18,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:18,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 12:14:18,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046482624] [2021-08-21 12:14:18,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:18,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:18,456 INFO L87 Difference]: Start difference. First operand 160 states and 466 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:18,552 INFO L93 Difference]: Finished difference Result 196 states and 544 transitions. [2021-08-21 12:14:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:18,554 INFO L225 Difference]: With dead ends: 196 [2021-08-21 12:14:18,554 INFO L226 Difference]: Without dead ends: 176 [2021-08-21 12:14:18,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-21 12:14:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 142. [2021-08-21 12:14:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.9148936170212765) internal successors, (411), 141 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 411 transitions. [2021-08-21 12:14:18,557 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 411 transitions. Word has length 15 [2021-08-21 12:14:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:18,557 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 411 transitions. [2021-08-21 12:14:18,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 411 transitions. [2021-08-21 12:14:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:18,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:18,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:18,586 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 12:14:18,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:18,771 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash -886565906, now seen corresponding path program 9 times [2021-08-21 12:14:18,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:18,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7554577] [2021-08-21 12:14:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:18,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:18,830 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 12:14:18,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:18,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7554577] [2021-08-21 12:14:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7554577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:18,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553577588] [2021-08-21 12:14:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:18,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:18,831 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 12:14:18,834 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 12:14:19,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:19,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:19,299 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 12:14:19,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553577588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:19,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:19,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-21 12:14:19,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769892067] [2021-08-21 12:14:19,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:19,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:19,301 INFO L87 Difference]: Start difference. First operand 142 states and 411 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:14:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:19,722 INFO L93 Difference]: Finished difference Result 229 states and 602 transitions. [2021-08-21 12:14:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:14:19,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 15 [2021-08-21 12:14:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:19,723 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:14:19,723 INFO L226 Difference]: Without dead ends: 184 [2021-08-21 12:14:19,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:14:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-08-21 12:14:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2021-08-21 12:14:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.962686567164179) internal successors, (397), 134 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 397 transitions. [2021-08-21 12:14:19,726 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 397 transitions. Word has length 15 [2021-08-21 12:14:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:19,727 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 397 transitions. [2021-08-21 12:14:19,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 12:14:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 397 transitions. [2021-08-21 12:14:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:19,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:19,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:19,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 12:14:19,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:14:19,941 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1386429543, now seen corresponding path program 16 times [2021-08-21 12:14:19,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:19,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421986188] [2021-08-21 12:14:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:19,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:19,998 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 12:14:19,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:19,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421986188] [2021-08-21 12:14:19,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421986188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:19,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337902454] [2021-08-21 12:14:19,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:19,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:19,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:20,000 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 12:14:20,000 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 12:14:20,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:20,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:20,507 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 12:14:20,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337902454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:20,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:20,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:20,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995773466] [2021-08-21 12:14:20,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:20,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:20,509 INFO L87 Difference]: Start difference. First operand 135 states and 397 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:20,646 INFO L93 Difference]: Finished difference Result 213 states and 565 transitions. [2021-08-21 12:14:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:20,648 INFO L225 Difference]: With dead ends: 213 [2021-08-21 12:14:20,648 INFO L226 Difference]: Without dead ends: 200 [2021-08-21 12:14:20,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-21 12:14:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 141. [2021-08-21 12:14:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.007142857142857) internal successors, (421), 140 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-08-21 12:14:20,651 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-08-21 12:14:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:20,652 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-08-21 12:14:20,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-08-21 12:14:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:20,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:20,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:20,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 12:14:20,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:14:20,857 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:20,857 INFO L82 PathProgramCache]: Analyzing trace with hash 534299509, now seen corresponding path program 17 times [2021-08-21 12:14:20,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:20,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912413393] [2021-08-21 12:14:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:20,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:20,914 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 12:14:20,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:20,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912413393] [2021-08-21 12:14:20,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912413393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:20,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720110026] [2021-08-21 12:14:20,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:20,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:20,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:20,916 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 12:14:20,916 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 12:14:21,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:21,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:21,432 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 12:14:21,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720110026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:21,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:21,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:21,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604117191] [2021-08-21 12:14:21,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:21,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:21,433 INFO L87 Difference]: Start difference. First operand 141 states and 421 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:21,555 INFO L93 Difference]: Finished difference Result 215 states and 572 transitions. [2021-08-21 12:14:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:21,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:21,556 INFO L225 Difference]: With dead ends: 215 [2021-08-21 12:14:21,556 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 12:14:21,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 12:14:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 141. [2021-08-21 12:14:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.007142857142857) internal successors, (421), 140 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-08-21 12:14:21,559 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-08-21 12:14:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:21,560 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-08-21 12:14:21,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-08-21 12:14:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:21,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:21,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:21,580 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 12:14:21,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:14:21,769 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1074015673, now seen corresponding path program 18 times [2021-08-21 12:14:21,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:21,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214718677] [2021-08-21 12:14:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:21,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:21,817 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 12:14:21,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:21,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214718677] [2021-08-21 12:14:21,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214718677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:21,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748213920] [2021-08-21 12:14:21,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:21,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:21,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:21,818 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 12:14:21,819 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 12:14:22,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:22,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:22,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:22,343 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 12:14:22,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748213920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:22,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:22,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:22,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746336804] [2021-08-21 12:14:22,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:22,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:22,345 INFO L87 Difference]: Start difference. First operand 141 states and 421 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:22,444 INFO L93 Difference]: Finished difference Result 202 states and 550 transitions. [2021-08-21 12:14:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:22,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:22,445 INFO L225 Difference]: With dead ends: 202 [2021-08-21 12:14:22,446 INFO L226 Difference]: Without dead ends: 191 [2021-08-21 12:14:22,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-21 12:14:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2021-08-21 12:14:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.9855072463768115) internal successors, (412), 138 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 412 transitions. [2021-08-21 12:14:22,449 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 412 transitions. Word has length 15 [2021-08-21 12:14:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:22,449 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 412 transitions. [2021-08-21 12:14:22,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 412 transitions. [2021-08-21 12:14:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:22,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:22,450 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:22,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:22,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:14:22,653 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2022632425, now seen corresponding path program 19 times [2021-08-21 12:14:22,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:22,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884500243] [2021-08-21 12:14:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:22,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:22,716 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 12:14:22,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:22,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884500243] [2021-08-21 12:14:22,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884500243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:22,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695388875] [2021-08-21 12:14:22,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:22,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:22,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:22,718 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 12:14:22,743 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 12:14:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:23,262 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 12:14:23,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695388875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:23,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:23,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:23,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066086784] [2021-08-21 12:14:23,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:23,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:23,263 INFO L87 Difference]: Start difference. First operand 139 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:23,372 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-08-21 12:14:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:23,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:23,373 INFO L225 Difference]: With dead ends: 173 [2021-08-21 12:14:23,373 INFO L226 Difference]: Without dead ends: 158 [2021-08-21 12:14:23,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-21 12:14:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2021-08-21 12:14:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0) internal successors, (408), 136 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 408 transitions. [2021-08-21 12:14:23,375 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 408 transitions. Word has length 15 [2021-08-21 12:14:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:23,376 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 408 transitions. [2021-08-21 12:14:23,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 408 transitions. [2021-08-21 12:14:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:23,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:23,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:23,394 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 12:14:23,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:14:23,577 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash 603051661, now seen corresponding path program 20 times [2021-08-21 12:14:23,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:23,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185442039] [2021-08-21 12:14:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:23,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:23,634 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 12:14:23,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:23,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185442039] [2021-08-21 12:14:23,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185442039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:23,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190724816] [2021-08-21 12:14:23,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:23,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:23,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:23,635 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 12:14:23,636 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 12:14:24,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:24,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:24,170 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 12:14:24,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190724816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:24,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:24,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:24,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104468380] [2021-08-21 12:14:24,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:24,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:24,172 INFO L87 Difference]: Start difference. First operand 137 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:24,296 INFO L93 Difference]: Finished difference Result 191 states and 521 transitions. [2021-08-21 12:14:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:24,297 INFO L225 Difference]: With dead ends: 191 [2021-08-21 12:14:24,297 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 12:14:24,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 12:14:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 141. [2021-08-21 12:14:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.0214285714285714) internal successors, (423), 140 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 423 transitions. [2021-08-21 12:14:24,301 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 423 transitions. Word has length 15 [2021-08-21 12:14:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:24,301 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 423 transitions. [2021-08-21 12:14:24,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 423 transitions. [2021-08-21 12:14:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:24,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:24,301 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:24,325 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 12:14:24,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:24,502 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1771186583, now seen corresponding path program 21 times [2021-08-21 12:14:24,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:24,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880634263] [2021-08-21 12:14:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:24,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:24,563 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 12:14:24,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:24,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880634263] [2021-08-21 12:14:24,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880634263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:24,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536337934] [2021-08-21 12:14:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:24,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:24,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:24,565 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 12:14:24,566 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 12:14:24,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:24,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:24,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:25,119 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 12:14:25,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536337934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:25,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:25,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:25,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450239722] [2021-08-21 12:14:25,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:25,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:25,121 INFO L87 Difference]: Start difference. First operand 141 states and 423 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:25,219 INFO L93 Difference]: Finished difference Result 178 states and 501 transitions. [2021-08-21 12:14:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:25,220 INFO L225 Difference]: With dead ends: 178 [2021-08-21 12:14:25,220 INFO L226 Difference]: Without dead ends: 167 [2021-08-21 12:14:25,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-21 12:14:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 137. [2021-08-21 12:14:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0) internal successors, (408), 136 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 408 transitions. [2021-08-21 12:14:25,223 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 408 transitions. Word has length 15 [2021-08-21 12:14:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:25,223 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 408 transitions. [2021-08-21 12:14:25,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 408 transitions. [2021-08-21 12:14:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:25,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:25,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:25,241 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 12:14:25,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:25,425 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash 96705395, now seen corresponding path program 22 times [2021-08-21 12:14:25,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:25,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333944521] [2021-08-21 12:14:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:25,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:25,478 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 12:14:25,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:25,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333944521] [2021-08-21 12:14:25,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333944521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:25,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8164304] [2021-08-21 12:14:25,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:25,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:25,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:25,480 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 12:14:25,493 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 12:14:25,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:25,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:26,049 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 12:14:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8164304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:26,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:26,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:26,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005384934] [2021-08-21 12:14:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:26,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:26,050 INFO L87 Difference]: Start difference. First operand 137 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:26,165 INFO L93 Difference]: Finished difference Result 192 states and 523 transitions. [2021-08-21 12:14:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:26,167 INFO L225 Difference]: With dead ends: 192 [2021-08-21 12:14:26,167 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 12:14:26,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 12:14:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 135. [2021-08-21 12:14:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.0) internal successors, (402), 134 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 402 transitions. [2021-08-21 12:14:26,171 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 402 transitions. Word has length 15 [2021-08-21 12:14:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:26,172 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 402 transitions. [2021-08-21 12:14:26,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 402 transitions. [2021-08-21 12:14:26,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:26,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:26,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:26,196 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 12:14:26,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:26,385 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2017434447, now seen corresponding path program 23 times [2021-08-21 12:14:26,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:26,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724010626] [2021-08-21 12:14:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:26,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:26,444 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 12:14:26,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:26,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724010626] [2021-08-21 12:14:26,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724010626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:26,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585150171] [2021-08-21 12:14:26,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:26,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:26,446 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 12:14:26,449 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 12:14:26,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:26,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:26,999 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 12:14:26,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585150171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:26,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:26,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:27,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042818284] [2021-08-21 12:14:27,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:27,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:27,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:27,000 INFO L87 Difference]: Start difference. First operand 135 states and 402 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:27,131 INFO L93 Difference]: Finished difference Result 196 states and 536 transitions. [2021-08-21 12:14:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:27,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:27,132 INFO L225 Difference]: With dead ends: 196 [2021-08-21 12:14:27,132 INFO L226 Difference]: Without dead ends: 185 [2021-08-21 12:14:27,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-08-21 12:14:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 134. [2021-08-21 12:14:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.992481203007519) internal successors, (398), 133 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 398 transitions. [2021-08-21 12:14:27,135 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 398 transitions. Word has length 15 [2021-08-21 12:14:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:27,135 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 398 transitions. [2021-08-21 12:14:27,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 398 transitions. [2021-08-21 12:14:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:14:27,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:27,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:27,154 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 12:14:27,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 12:14:27,337 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash 409119265, now seen corresponding path program 24 times [2021-08-21 12:14:27,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:27,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356043265] [2021-08-21 12:14:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:27,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:27,380 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 12:14:27,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:27,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356043265] [2021-08-21 12:14:27,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356043265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:27,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604878535] [2021-08-21 12:14:27,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:27,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:27,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:27,381 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 12:14:27,382 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 12:14:27,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:27,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:14:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:27,918 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 12:14:27,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604878535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:27,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:27,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:27,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680660300] [2021-08-21 12:14:27,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:27,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:27,919 INFO L87 Difference]: Start difference. First operand 134 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:28,027 INFO L93 Difference]: Finished difference Result 190 states and 534 transitions. [2021-08-21 12:14:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:14:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:28,028 INFO L225 Difference]: With dead ends: 190 [2021-08-21 12:14:28,028 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 12:14:28,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 12:14:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 123. [2021-08-21 12:14:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.9918032786885247) internal successors, (365), 122 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 365 transitions. [2021-08-21 12:14:28,031 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 365 transitions. Word has length 15 [2021-08-21 12:14:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:28,031 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 365 transitions. [2021-08-21 12:14:28,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 365 transitions. [2021-08-21 12:14:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:28,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:28,032 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:28,055 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 12:14:28,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 12:14:28,246 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash 20106213, now seen corresponding path program 1 times [2021-08-21 12:14:28,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:28,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809308037] [2021-08-21 12:14:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:28,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:28,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:28,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809308037] [2021-08-21 12:14:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809308037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:28,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975527959] [2021-08-21 12:14:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:28,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:28,304 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 12:14:28,304 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 12:14:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:28,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:28,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975527959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:28,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:28,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 12:14:28,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866469603] [2021-08-21 12:14:28,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:28,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:28,847 INFO L87 Difference]: Start difference. First operand 123 states and 365 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:28,922 INFO L93 Difference]: Finished difference Result 171 states and 478 transitions. [2021-08-21 12:14:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:28,923 INFO L225 Difference]: With dead ends: 171 [2021-08-21 12:14:28,923 INFO L226 Difference]: Without dead ends: 158 [2021-08-21 12:14:28,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-21 12:14:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2021-08-21 12:14:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0078125) internal successors, (385), 128 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 385 transitions. [2021-08-21 12:14:28,926 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 385 transitions. Word has length 16 [2021-08-21 12:14:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:28,926 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 385 transitions. [2021-08-21 12:14:28,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 385 transitions. [2021-08-21 12:14:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:28,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:28,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:28,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:29,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:14:29,153 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2040753589, now seen corresponding path program 2 times [2021-08-21 12:14:29,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:29,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738933941] [2021-08-21 12:14:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:29,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:29,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:29,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738933941] [2021-08-21 12:14:29,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738933941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:29,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275745305] [2021-08-21 12:14:29,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:29,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:29,201 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 12:14:29,202 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 12:14:29,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:29,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:29,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275745305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:29,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:29,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:14:29,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975210117] [2021-08-21 12:14:29,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:29,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:29,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:29,736 INFO L87 Difference]: Start difference. First operand 129 states and 385 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:29,806 INFO L93 Difference]: Finished difference Result 161 states and 467 transitions. [2021-08-21 12:14:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:29,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:29,807 INFO L225 Difference]: With dead ends: 161 [2021-08-21 12:14:29,807 INFO L226 Difference]: Without dead ends: 148 [2021-08-21 12:14:29,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-21 12:14:29,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2021-08-21 12:14:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.954954954954955) internal successors, (328), 111 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 328 transitions. [2021-08-21 12:14:29,810 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 328 transitions. Word has length 16 [2021-08-21 12:14:29,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:29,810 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 328 transitions. [2021-08-21 12:14:29,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 328 transitions. [2021-08-21 12:14:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:29,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:29,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:29,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 12:14:30,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:14:30,025 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:30,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1665857404, now seen corresponding path program 1 times [2021-08-21 12:14:30,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:30,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573966368] [2021-08-21 12:14:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:30,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:30,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:30,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573966368] [2021-08-21 12:14:30,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573966368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:30,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27968980] [2021-08-21 12:14:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:30,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:30,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:30,085 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 12:14:30,086 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 12:14:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:30,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27968980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:30,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:30,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:30,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226192114] [2021-08-21 12:14:30,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:30,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:30,655 INFO L87 Difference]: Start difference. First operand 112 states and 328 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:30,757 INFO L93 Difference]: Finished difference Result 148 states and 416 transitions. [2021-08-21 12:14:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:30,758 INFO L225 Difference]: With dead ends: 148 [2021-08-21 12:14:30,758 INFO L226 Difference]: Without dead ends: 146 [2021-08-21 12:14:30,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:14:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-21 12:14:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2021-08-21 12:14:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.9734513274336285) internal successors, (336), 113 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 336 transitions. [2021-08-21 12:14:30,762 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 336 transitions. Word has length 16 [2021-08-21 12:14:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:30,762 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 336 transitions. [2021-08-21 12:14:30,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 336 transitions. [2021-08-21 12:14:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:30,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:30,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:30,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 12:14:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:30,963 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash -3204716, now seen corresponding path program 2 times [2021-08-21 12:14:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:30,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070457987] [2021-08-21 12:14:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:30,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:31,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:31,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070457987] [2021-08-21 12:14:31,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070457987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:31,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132630382] [2021-08-21 12:14:31,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:31,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:31,007 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 12:14:31,007 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 12:14:31,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:31,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:31,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132630382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:31,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:31,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:31,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483371324] [2021-08-21 12:14:31,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:31,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:31,531 INFO L87 Difference]: Start difference. First operand 114 states and 336 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:31,646 INFO L93 Difference]: Finished difference Result 127 states and 368 transitions. [2021-08-21 12:14:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:31,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:31,647 INFO L225 Difference]: With dead ends: 127 [2021-08-21 12:14:31,648 INFO L226 Difference]: Without dead ends: 123 [2021-08-21 12:14:31,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-21 12:14:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2021-08-21 12:14:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.9557522123893807) internal successors, (334), 113 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 334 transitions. [2021-08-21 12:14:31,650 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 334 transitions. Word has length 16 [2021-08-21 12:14:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:31,651 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 334 transitions. [2021-08-21 12:14:31,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 334 transitions. [2021-08-21 12:14:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:31,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:31,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:31,677 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 12:14:31,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:14:31,877 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1067180476, now seen corresponding path program 3 times [2021-08-21 12:14:31,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:31,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786768085] [2021-08-21 12:14:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:31,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:31,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:31,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786768085] [2021-08-21 12:14:31,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786768085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:31,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319845931] [2021-08-21 12:14:31,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:31,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:31,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:31,937 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 12:14:31,963 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 12:14:32,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:32,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:32,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:32,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319845931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:32,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:32,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:32,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700388650] [2021-08-21 12:14:32,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:32,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:32,530 INFO L87 Difference]: Start difference. First operand 114 states and 334 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:32,633 INFO L93 Difference]: Finished difference Result 189 states and 521 transitions. [2021-08-21 12:14:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:32,635 INFO L225 Difference]: With dead ends: 189 [2021-08-21 12:14:32,635 INFO L226 Difference]: Without dead ends: 187 [2021-08-21 12:14:32,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-21 12:14:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 118. [2021-08-21 12:14:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 3.0085470085470085) internal successors, (352), 117 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 352 transitions. [2021-08-21 12:14:32,637 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 352 transitions. Word has length 16 [2021-08-21 12:14:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:32,637 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 352 transitions. [2021-08-21 12:14:32,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 352 transitions. [2021-08-21 12:14:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:32,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:32,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:32,655 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 12:14:32,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:14:32,838 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1311310652, now seen corresponding path program 4 times [2021-08-21 12:14:32,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:32,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660829022] [2021-08-21 12:14:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:32,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:32,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:32,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660829022] [2021-08-21 12:14:32,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660829022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:32,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479182219] [2021-08-21 12:14:32,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:32,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:32,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:32,888 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 12:14:32,889 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 12:14:33,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:33,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:33,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479182219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:33,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:33,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 12:14:33,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491623541] [2021-08-21 12:14:33,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:33,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:33,467 INFO L87 Difference]: Start difference. First operand 118 states and 352 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:33,545 INFO L93 Difference]: Finished difference Result 175 states and 474 transitions. [2021-08-21 12:14:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:33,546 INFO L225 Difference]: With dead ends: 175 [2021-08-21 12:14:33,546 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 12:14:33,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 12:14:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-08-21 12:14:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.9174311926605503) internal successors, (318), 109 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 318 transitions. [2021-08-21 12:14:33,549 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 318 transitions. Word has length 16 [2021-08-21 12:14:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:33,549 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 318 transitions. [2021-08-21 12:14:33,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 318 transitions. [2021-08-21 12:14:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:33,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:33,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:33,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:33,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-21 12:14:33,765 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541710, now seen corresponding path program 5 times [2021-08-21 12:14:33,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:33,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398900892] [2021-08-21 12:14:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:33,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:33,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:33,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398900892] [2021-08-21 12:14:33,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398900892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:33,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599950717] [2021-08-21 12:14:33,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:33,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:33,813 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 12:14:33,815 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 12:14:34,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:34,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599950717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:34,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:34,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:34,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171904419] [2021-08-21 12:14:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:34,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:34,401 INFO L87 Difference]: Start difference. First operand 110 states and 318 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:34,477 INFO L93 Difference]: Finished difference Result 160 states and 440 transitions. [2021-08-21 12:14:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:34,478 INFO L225 Difference]: With dead ends: 160 [2021-08-21 12:14:34,478 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 12:14:34,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 12:14:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2021-08-21 12:14:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.9272727272727272) internal successors, (322), 110 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 12:14:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 322 transitions. [2021-08-21 12:14:34,481 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 322 transitions. Word has length 16 [2021-08-21 12:14:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:34,481 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 322 transitions. [2021-08-21 12:14:34,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 322 transitions. [2021-08-21 12:14:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:34,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:34,482 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:34,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:34,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:34,708 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:34,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1229911596, now seen corresponding path program 6 times [2021-08-21 12:14:34,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:34,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256297567] [2021-08-21 12:14:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:34,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256297567] [2021-08-21 12:14:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256297567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373285475] [2021-08-21 12:14:34,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:34,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:34,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:34,756 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 12:14:34,757 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 12:14:35,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:35,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:35,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373285475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:35,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:35,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:14:35,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268678236] [2021-08-21 12:14:35,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:35,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:35,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:35,344 INFO L87 Difference]: Start difference. First operand 111 states and 322 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:35,437 INFO L93 Difference]: Finished difference Result 133 states and 364 transitions. [2021-08-21 12:14:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:14:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:35,438 INFO L225 Difference]: With dead ends: 133 [2021-08-21 12:14:35,438 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 12:14:35,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 12:14:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-08-21 12:14:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-08-21 12:14:35,440 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-08-21 12:14:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:35,440 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-08-21 12:14:35,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-08-21 12:14:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:14:35,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:35,441 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:35,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 12:14:35,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:35,641 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:35,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1637734191, now seen corresponding path program 1 times [2021-08-21 12:14:35,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:35,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576701804] [2021-08-21 12:14:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:35,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:35,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:35,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576701804] [2021-08-21 12:14:35,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576701804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:35,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12622449] [2021-08-21 12:14:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:35,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:35,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:35,957 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 12:14:35,958 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 12:14:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:14:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:36,765 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:36,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-21 12:14:37,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2021-08-21 12:14:37,312 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:37,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-08-21 12:14:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:37,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12622449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:37,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:37,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:14:37,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452000007] [2021-08-21 12:14:37,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:14:37,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:14:37,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:37,971 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:40,212 INFO L93 Difference]: Finished difference Result 294 states and 803 transitions. [2021-08-21 12:14:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:14:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:14:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:40,214 INFO L225 Difference]: With dead ends: 294 [2021-08-21 12:14:40,214 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 12:14:40,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2034.7ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:14:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 12:14:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-08-21 12:14:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-08-21 12:14:40,218 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 17 [2021-08-21 12:14:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:40,218 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-08-21 12:14:40,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-08-21 12:14:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:14:40,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:40,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:40,243 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 12:14:40,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:40,443 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash -311332163, now seen corresponding path program 2 times [2021-08-21 12:14:40,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:40,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210357440] [2021-08-21 12:14:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:40,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:40,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:40,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210357440] [2021-08-21 12:14:40,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210357440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:40,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366201308] [2021-08-21 12:14:40,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:40,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:40,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:40,778 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 12:14:40,797 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 12:14:41,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:41,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:14:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:41,965 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:41,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2021-08-21 12:14:42,338 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 62 treesize of output 50 [2021-08-21 12:14:42,345 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:42,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-21 12:14:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:42,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366201308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:42,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:42,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:14:42,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245841293] [2021-08-21 12:14:42,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:14:42,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:14:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:42,454 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:43,119 INFO L93 Difference]: Finished difference Result 229 states and 646 transitions. [2021-08-21 12:14:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:43,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:14:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:43,120 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:14:43,120 INFO L226 Difference]: Without dead ends: 225 [2021-08-21 12:14:43,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:14:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-21 12:14:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 148. [2021-08-21 12:14:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.9183673469387754) internal successors, (429), 147 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2021-08-21 12:14:43,123 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 17 [2021-08-21 12:14:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:43,123 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2021-08-21 12:14:43,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2021-08-21 12:14:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:14:43,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:43,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:43,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 12:14:43,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:14:43,340 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash -571981107, now seen corresponding path program 3 times [2021-08-21 12:14:43,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:43,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405287888] [2021-08-21 12:14:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:43,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:43,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:43,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405287888] [2021-08-21 12:14:43,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405287888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:43,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479473978] [2021-08-21 12:14:43,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:43,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:43,653 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 12:14:43,656 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 12:14:44,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:14:44,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:14:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:44,878 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-21 12:14:45,197 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:45,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-21 12:14:45,200 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 99 treesize of output 79 [2021-08-21 12:14:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:45,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479473978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:45,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:45,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:14:45,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354846083] [2021-08-21 12:14:45,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:14:45,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:45,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:14:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:45,513 INFO L87 Difference]: Start difference. First operand 148 states and 429 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:46,350 INFO L93 Difference]: Finished difference Result 228 states and 644 transitions. [2021-08-21 12:14:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:14:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:46,352 INFO L225 Difference]: With dead ends: 228 [2021-08-21 12:14:46,352 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:14:46,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 833.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:14:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:14:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2021-08-21 12:14:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.9072847682119205) internal successors, (439), 151 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 439 transitions. [2021-08-21 12:14:46,355 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 439 transitions. Word has length 17 [2021-08-21 12:14:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 439 transitions. [2021-08-21 12:14:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 439 transitions. [2021-08-21 12:14:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:14:46,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:46,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:46,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 12:14:46,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:14:46,556 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:46,557 INFO L82 PathProgramCache]: Analyzing trace with hash 226523415, now seen corresponding path program 4 times [2021-08-21 12:14:46,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:46,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700640332] [2021-08-21 12:14:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:46,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:46,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:46,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700640332] [2021-08-21 12:14:46,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700640332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:46,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634960346] [2021-08-21 12:14:46,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:46,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:46,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:46,836 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 12:14:46,837 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 12:14:47,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:47,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:14:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:47,827 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:47,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-21 12:14:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2021-08-21 12:14:48,219 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:48,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-08-21 12:14:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634960346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:48,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:48,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:14:48,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825196621] [2021-08-21 12:14:48,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:14:48,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:14:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:48,885 INFO L87 Difference]: Start difference. First operand 152 states and 439 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:50,708 INFO L93 Difference]: Finished difference Result 261 states and 746 transitions. [2021-08-21 12:14:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:14:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:14:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:50,710 INFO L225 Difference]: With dead ends: 261 [2021-08-21 12:14:50,710 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 12:14:50,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1621.4ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:14:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 12:14:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 158. [2021-08-21 12:14:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-08-21 12:14:50,714 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-08-21 12:14:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:50,714 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-08-21 12:14:50,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-08-21 12:14:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:14:50,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:50,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:50,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:50,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 12:14:50,929 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:50,929 INFO L82 PathProgramCache]: Analyzing trace with hash -34125529, now seen corresponding path program 5 times [2021-08-21 12:14:50,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:50,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447221471] [2021-08-21 12:14:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:50,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:51,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:51,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447221471] [2021-08-21 12:14:51,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447221471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:51,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252176292] [2021-08-21 12:14:51,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:51,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:51,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:51,199 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 12:14:51,199 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 12:14:51,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:14:51,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:51,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:14:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:52,435 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:52,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-08-21 12:14:52,681 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:52,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 111 [2021-08-21 12:14:52,685 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 108 treesize of output 88 [2021-08-21 12:14:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:53,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252176292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:53,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:53,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:14:53,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103382401] [2021-08-21 12:14:53,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:14:53,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:14:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:53,007 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:53,757 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2021-08-21 12:14:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:14:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:53,758 INFO L225 Difference]: With dead ends: 248 [2021-08-21 12:14:53,758 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 12:14:53,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 775.2ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:14:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 12:14:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-08-21 12:14:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9056603773584904) internal successors, (462), 159 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 462 transitions. [2021-08-21 12:14:53,762 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 462 transitions. Word has length 17 [2021-08-21 12:14:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:53,762 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 462 transitions. [2021-08-21 12:14:53,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 462 transitions. [2021-08-21 12:14:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:14:53,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:53,763 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:53,786 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 12:14:53,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 12:14:53,977 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282833, now seen corresponding path program 6 times [2021-08-21 12:14:53,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:53,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800335450] [2021-08-21 12:14:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:53,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:54,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:54,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800335450] [2021-08-21 12:14:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800335450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:54,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265573154] [2021-08-21 12:14:54,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:54,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:54,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:54,245 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 12:14:54,269 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 12:14:55,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:14:55,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:55,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:14:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:55,410 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:55,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-08-21 12:14:55,778 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:14:55,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 113 [2021-08-21 12:14:55,781 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 110 treesize of output 90 [2021-08-21 12:14:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:56,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265573154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:56,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:56,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:14:56,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559696928] [2021-08-21 12:14:56,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:14:56,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:14:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:56,055 INFO L87 Difference]: Start difference. First operand 160 states and 462 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:57,004 INFO L93 Difference]: Finished difference Result 272 states and 752 transitions. [2021-08-21 12:14:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:57,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:14:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:57,005 INFO L225 Difference]: With dead ends: 272 [2021-08-21 12:14:57,005 INFO L226 Difference]: Without dead ends: 268 [2021-08-21 12:14:57,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:14:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-21 12:14:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 164. [2021-08-21 12:14:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.895705521472393) internal successors, (472), 163 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 472 transitions. [2021-08-21 12:14:57,009 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 472 transitions. Word has length 17 [2021-08-21 12:14:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:57,010 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 472 transitions. [2021-08-21 12:14:57,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 472 transitions. [2021-08-21 12:14:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:14:57,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:57,010 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:57,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:14:57,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 12:14:57,221 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1271153761, now seen corresponding path program 7 times [2021-08-21 12:14:57,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:57,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941164420] [2021-08-21 12:14:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:57,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:57,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:57,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941164420] [2021-08-21 12:14:57,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941164420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:57,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330530341] [2021-08-21 12:14:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:57,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:57,582 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 12:14:57,582 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 12:14:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:14:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:58,578 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 48 treesize of output 38 [2021-08-21 12:14:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:14:58,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-21 12:14:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:59,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330530341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:59,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:59,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:14:59,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971836267] [2021-08-21 12:14:59,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:14:59,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:14:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:14:59,298 INFO L87 Difference]: Start difference. First operand 164 states and 472 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:01,308 INFO L93 Difference]: Finished difference Result 283 states and 790 transitions. [2021-08-21 12:15:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:15:01,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:01,310 INFO L225 Difference]: With dead ends: 283 [2021-08-21 12:15:01,310 INFO L226 Difference]: Without dead ends: 275 [2021-08-21 12:15:01,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1927.8ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:15:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-21 12:15:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 164. [2021-08-21 12:15:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.895705521472393) internal successors, (472), 163 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 472 transitions. [2021-08-21 12:15:01,314 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 472 transitions. Word has length 17 [2021-08-21 12:15:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:01,314 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 472 transitions. [2021-08-21 12:15:01,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 472 transitions. [2021-08-21 12:15:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:01,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:01,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:01,338 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 12:15:01,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:15:01,529 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1010504817, now seen corresponding path program 8 times [2021-08-21 12:15:01,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:01,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305056587] [2021-08-21 12:15:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:01,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:01,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:01,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305056587] [2021-08-21 12:15:01,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305056587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:01,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777361801] [2021-08-21 12:15:01,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:01,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:01,769 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 12:15:01,770 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 12:15:02,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:02,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:15:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:03,224 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:03,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-21 12:15:03,507 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:03,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-21 12:15:03,511 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 99 treesize of output 79 [2021-08-21 12:15:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777361801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:03,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:03,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:15:03,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417234466] [2021-08-21 12:15:03,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:03,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:03,756 INFO L87 Difference]: Start difference. First operand 164 states and 472 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:04,427 INFO L93 Difference]: Finished difference Result 257 states and 724 transitions. [2021-08-21 12:15:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:15:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:04,428 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:15:04,428 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 12:15:04,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 709.4ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 12:15:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 161. [2021-08-21 12:15:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.90625) internal successors, (465), 160 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 465 transitions. [2021-08-21 12:15:04,431 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 465 transitions. Word has length 17 [2021-08-21 12:15:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:04,431 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 465 transitions. [2021-08-21 12:15:04,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 465 transitions. [2021-08-21 12:15:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:04,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:04,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:04,451 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 12:15:04,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:04,635 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash -15316595, now seen corresponding path program 9 times [2021-08-21 12:15:04,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:04,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562083631] [2021-08-21 12:15:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:04,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:05,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:05,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562083631] [2021-08-21 12:15:05,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562083631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:05,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624472266] [2021-08-21 12:15:05,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:05,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:05,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:05,014 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 12:15:05,015 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 12:15:05,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:15:05,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:15:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:06,476 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:06,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-21 12:15:06,762 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:06,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 105 [2021-08-21 12:15:06,765 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 102 treesize of output 82 [2021-08-21 12:15:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:07,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624472266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:07,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:07,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:15:07,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646522119] [2021-08-21 12:15:07,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:07,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:07,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:07,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:07,034 INFO L87 Difference]: Start difference. First operand 161 states and 465 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:07,734 INFO L93 Difference]: Finished difference Result 249 states and 706 transitions. [2021-08-21 12:15:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:15:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:07,735 INFO L225 Difference]: With dead ends: 249 [2021-08-21 12:15:07,735 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 12:15:07,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 12:15:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 162. [2021-08-21 12:15:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.9130434782608696) internal successors, (469), 161 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 469 transitions. [2021-08-21 12:15:07,739 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 469 transitions. Word has length 17 [2021-08-21 12:15:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:07,739 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 469 transitions. [2021-08-21 12:15:07,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 469 transitions. [2021-08-21 12:15:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:07,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:07,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:07,761 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 12:15:07,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:07,949 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:07,949 INFO L82 PathProgramCache]: Analyzing trace with hash -602258127, now seen corresponding path program 10 times [2021-08-21 12:15:07,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:07,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479555502] [2021-08-21 12:15:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:07,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:08,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:08,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479555502] [2021-08-21 12:15:08,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479555502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:08,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840841529] [2021-08-21 12:15:08,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:08,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:08,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:08,277 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 12:15:08,278 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 12:15:09,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:09,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:15:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:09,412 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:09,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:15:10,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 176 [2021-08-21 12:15:10,563 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:10,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 145 [2021-08-21 12:15:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:11,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840841529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:11,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:11,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:15:11,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156317115] [2021-08-21 12:15:11,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:11,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:11,216 INFO L87 Difference]: Start difference. First operand 162 states and 469 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:12,327 INFO L93 Difference]: Finished difference Result 279 states and 786 transitions. [2021-08-21 12:15:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:15:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:12,329 INFO L225 Difference]: With dead ends: 279 [2021-08-21 12:15:12,329 INFO L226 Difference]: Without dead ends: 271 [2021-08-21 12:15:12,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-21 12:15:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 164. [2021-08-21 12:15:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.9263803680981595) internal successors, (477), 163 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 477 transitions. [2021-08-21 12:15:12,333 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 477 transitions. Word has length 17 [2021-08-21 12:15:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:12,333 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 477 transitions. [2021-08-21 12:15:12,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 477 transitions. [2021-08-21 12:15:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:12,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:12,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:12,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 12:15:12,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:12,545 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1769818229, now seen corresponding path program 11 times [2021-08-21 12:15:12,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:12,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107863044] [2021-08-21 12:15:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:12,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:12,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:12,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107863044] [2021-08-21 12:15:12,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107863044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:12,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879770379] [2021-08-21 12:15:12,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:12,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:12,812 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 12:15:12,813 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 12:15:13,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:15:13,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:13,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:15:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:14,136 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:14,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 82 [2021-08-21 12:15:14,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-21 12:15:14,664 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:14,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-21 12:15:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:15,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879770379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:15,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:15,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:15:15,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906515418] [2021-08-21 12:15:15,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:15,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:15,639 INFO L87 Difference]: Start difference. First operand 164 states and 477 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:17,062 INFO L93 Difference]: Finished difference Result 310 states and 855 transitions. [2021-08-21 12:15:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:15:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:17,065 INFO L225 Difference]: With dead ends: 310 [2021-08-21 12:15:17,065 INFO L226 Difference]: Without dead ends: 302 [2021-08-21 12:15:17,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1277.8ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:15:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-21 12:15:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 167. [2021-08-21 12:15:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-08-21 12:15:17,069 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-08-21 12:15:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:17,070 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-08-21 12:15:17,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-08-21 12:15:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:17,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:17,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:17,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 12:15:17,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-21 12:15:17,289 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1208991763, now seen corresponding path program 12 times [2021-08-21 12:15:17,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:17,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414658011] [2021-08-21 12:15:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:17,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:17,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:17,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414658011] [2021-08-21 12:15:17,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414658011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:17,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737869980] [2021-08-21 12:15:17,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:17,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:17,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:17,701 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 12:15:17,752 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 12:15:18,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:15:18,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:18,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:15:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:19,075 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:19,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 82 [2021-08-21 12:15:19,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2021-08-21 12:15:19,893 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:19,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 143 [2021-08-21 12:15:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737869980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:20,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:20,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:15:20,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053043261] [2021-08-21 12:15:20,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:15:20,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:15:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:20,816 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:22,592 INFO L93 Difference]: Finished difference Result 310 states and 870 transitions. [2021-08-21 12:15:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:15:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:22,594 INFO L225 Difference]: With dead ends: 310 [2021-08-21 12:15:22,594 INFO L226 Difference]: Without dead ends: 302 [2021-08-21 12:15:22,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1746.1ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:15:22,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-21 12:15:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 167. [2021-08-21 12:15:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.963855421686747) internal successors, (492), 166 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 492 transitions. [2021-08-21 12:15:22,597 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 492 transitions. Word has length 17 [2021-08-21 12:15:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:22,598 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 492 transitions. [2021-08-21 12:15:22,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 492 transitions. [2021-08-21 12:15:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:22,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:22,598 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:22,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 12:15:22,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:15:22,813 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash 684316217, now seen corresponding path program 13 times [2021-08-21 12:15:22,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:22,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50830634] [2021-08-21 12:15:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:22,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:23,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:23,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50830634] [2021-08-21 12:15:23,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50830634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:23,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142230896] [2021-08-21 12:15:23,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:23,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:23,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:23,236 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 12:15:23,237 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 12:15:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:24,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:15:24,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:24,866 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:24,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-21 12:15:25,239 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:25,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-21 12:15:25,242 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 99 treesize of output 79 [2021-08-21 12:15:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:25,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142230896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:25,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:25,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:15:25,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438177489] [2021-08-21 12:15:25,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:15:25,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:25,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:15:25,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:25,490 INFO L87 Difference]: Start difference. First operand 167 states and 492 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:26,223 INFO L93 Difference]: Finished difference Result 255 states and 726 transitions. [2021-08-21 12:15:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:15:26,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:26,224 INFO L225 Difference]: With dead ends: 255 [2021-08-21 12:15:26,224 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 12:15:26,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 770.8ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:15:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 12:15:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2021-08-21 12:15:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.9695121951219514) internal successors, (487), 164 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 487 transitions. [2021-08-21 12:15:26,228 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 487 transitions. Word has length 17 [2021-08-21 12:15:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:26,228 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 487 transitions. [2021-08-21 12:15:26,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 487 transitions. [2021-08-21 12:15:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:26,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:26,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:26,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 12:15:26,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:26,453 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 97374685, now seen corresponding path program 14 times [2021-08-21 12:15:26,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:26,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037596127] [2021-08-21 12:15:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:26,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:26,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:26,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037596127] [2021-08-21 12:15:26,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037596127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:26,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343244990] [2021-08-21 12:15:26,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:26,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:26,815 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 12:15:26,815 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 12:15:28,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:28,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:28,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:15:28,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:15:29,049 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:29,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2021-08-21 12:15:29,057 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 104 treesize of output 82 [2021-08-21 12:15:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:29,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343244990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:29,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:29,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:15:29,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738792641] [2021-08-21 12:15:29,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:15:29,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:15:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:29,230 INFO L87 Difference]: Start difference. First operand 165 states and 487 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:30,023 INFO L93 Difference]: Finished difference Result 256 states and 727 transitions. [2021-08-21 12:15:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:15:30,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:30,025 INFO L225 Difference]: With dead ends: 256 [2021-08-21 12:15:30,025 INFO L226 Difference]: Without dead ends: 252 [2021-08-21 12:15:30,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 895.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:15:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-21 12:15:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2021-08-21 12:15:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.96319018404908) internal successors, (483), 163 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 483 transitions. [2021-08-21 12:15:30,028 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 483 transitions. Word has length 17 [2021-08-21 12:15:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:30,028 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 483 transitions. [2021-08-21 12:15:30,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 483 transitions. [2021-08-21 12:15:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:30,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:30,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:30,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:30,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:30,229 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:30,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1031380317, now seen corresponding path program 15 times [2021-08-21 12:15:30,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:30,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646975561] [2021-08-21 12:15:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:30,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:30,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:30,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646975561] [2021-08-21 12:15:30,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646975561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:30,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682431800] [2021-08-21 12:15:30,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:30,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:30,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:30,566 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 12:15:30,566 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 12:15:31,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:15:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:15:31,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:32,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:15:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:32,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2021-08-21 12:15:32,301 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 100 treesize of output 80 [2021-08-21 12:15:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682431800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:32,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:15:32,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334753645] [2021-08-21 12:15:32,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:32,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:32,862 INFO L87 Difference]: Start difference. First operand 164 states and 483 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:34,201 INFO L93 Difference]: Finished difference Result 267 states and 758 transitions. [2021-08-21 12:15:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:15:34,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:34,202 INFO L225 Difference]: With dead ends: 267 [2021-08-21 12:15:34,202 INFO L226 Difference]: Without dead ends: 263 [2021-08-21 12:15:34,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1288.1ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:15:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-21 12:15:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 161. [2021-08-21 12:15:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.94375) internal successors, (471), 160 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 471 transitions. [2021-08-21 12:15:34,205 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 471 transitions. Word has length 17 [2021-08-21 12:15:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:34,205 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 471 transitions. [2021-08-21 12:15:34,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 471 transitions. [2021-08-21 12:15:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:34,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:34,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:34,226 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 12:15:34,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:15:34,407 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1497232907, now seen corresponding path program 16 times [2021-08-21 12:15:34,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:34,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301983321] [2021-08-21 12:15:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:34,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:34,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:34,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301983321] [2021-08-21 12:15:34,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301983321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:34,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936960007] [2021-08-21 12:15:34,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:34,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:34,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:34,660 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 12:15:34,660 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 12:15:35,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:15:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:36,175 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:36,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-21 12:15:36,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2021-08-21 12:15:36,605 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:36,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-08-21 12:15:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:37,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936960007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:37,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:37,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:15:37,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860372861] [2021-08-21 12:15:37,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:15:37,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:15:37,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:37,202 INFO L87 Difference]: Start difference. First operand 161 states and 471 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:38,201 INFO L93 Difference]: Finished difference Result 280 states and 780 transitions. [2021-08-21 12:15:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:15:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:38,202 INFO L225 Difference]: With dead ends: 280 [2021-08-21 12:15:38,202 INFO L226 Difference]: Without dead ends: 272 [2021-08-21 12:15:38,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 837.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:15:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-21 12:15:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 168. [2021-08-21 12:15:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.946107784431138) internal successors, (492), 167 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 492 transitions. [2021-08-21 12:15:38,206 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 492 transitions. Word has length 17 [2021-08-21 12:15:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:38,206 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 492 transitions. [2021-08-21 12:15:38,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 492 transitions. [2021-08-21 12:15:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:38,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:38,207 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:38,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 12:15:38,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:15:38,421 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash 848668035, now seen corresponding path program 17 times [2021-08-21 12:15:38,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:38,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774326711] [2021-08-21 12:15:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:38,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:38,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:38,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774326711] [2021-08-21 12:15:38,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774326711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:38,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317208844] [2021-08-21 12:15:38,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:38,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:38,733 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 12:15:38,734 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 12:15:40,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:40,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:40,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:15:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:40,426 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:40,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2021-08-21 12:15:40,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 113 [2021-08-21 12:15:40,805 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:40,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 92 [2021-08-21 12:15:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:41,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317208844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:41,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:41,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:15:41,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992896508] [2021-08-21 12:15:41,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:15:41,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:41,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:15:41,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:41,364 INFO L87 Difference]: Start difference. First operand 168 states and 492 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:42,258 INFO L93 Difference]: Finished difference Result 217 states and 631 transitions. [2021-08-21 12:15:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:15:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:42,260 INFO L225 Difference]: With dead ends: 217 [2021-08-21 12:15:42,260 INFO L226 Difference]: Without dead ends: 213 [2021-08-21 12:15:42,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 768.6ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:15:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-21 12:15:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2021-08-21 12:15:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.947058823529412) internal successors, (501), 170 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 501 transitions. [2021-08-21 12:15:42,262 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 501 transitions. Word has length 17 [2021-08-21 12:15:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:42,262 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 501 transitions. [2021-08-21 12:15:42,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 501 transitions. [2021-08-21 12:15:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:42,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:42,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:42,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 12:15:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:42,464 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash 588019091, now seen corresponding path program 18 times [2021-08-21 12:15:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:42,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544164802] [2021-08-21 12:15:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:42,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:42,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:42,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544164802] [2021-08-21 12:15:42,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544164802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:42,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073097332] [2021-08-21 12:15:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:42,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:42,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:42,721 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 12:15:42,722 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 12:15:44,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:15:44,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:15:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:44,674 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:44,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2021-08-21 12:15:44,898 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:44,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 116 [2021-08-21 12:15:44,905 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:44,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-21 12:15:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:45,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073097332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:45,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:45,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:15:45,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862843585] [2021-08-21 12:15:45,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:15:45,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:15:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:45,174 INFO L87 Difference]: Start difference. First operand 171 states and 501 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:45,830 INFO L93 Difference]: Finished difference Result 202 states and 581 transitions. [2021-08-21 12:15:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:45,831 INFO L225 Difference]: With dead ends: 202 [2021-08-21 12:15:45,831 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 12:15:45,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 12:15:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 168. [2021-08-21 12:15:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9580838323353293) internal successors, (494), 167 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 494 transitions. [2021-08-21 12:15:45,834 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 494 transitions. Word has length 17 [2021-08-21 12:15:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:45,834 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 494 transitions. [2021-08-21 12:15:45,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 494 transitions. [2021-08-21 12:15:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:45,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:45,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:45,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 12:15:46,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 12:15:46,049 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:46,049 INFO L82 PathProgramCache]: Analyzing trace with hash -437802321, now seen corresponding path program 19 times [2021-08-21 12:15:46,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:46,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068500681] [2021-08-21 12:15:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:46,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:46,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:46,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068500681] [2021-08-21 12:15:46,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068500681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:46,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755895634] [2021-08-21 12:15:46,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:46,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:46,422 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 12:15:46,423 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 12:15:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:15:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:48,205 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:15:48,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-21 12:15:48,688 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:48,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-21 12:15:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:49,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755895634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:49,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:49,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:15:49,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658853851] [2021-08-21 12:15:49,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:49,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:49,713 INFO L87 Difference]: Start difference. First operand 168 states and 494 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:50,717 INFO L93 Difference]: Finished difference Result 246 states and 686 transitions. [2021-08-21 12:15:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:15:50,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:50,718 INFO L225 Difference]: With dead ends: 246 [2021-08-21 12:15:50,718 INFO L226 Difference]: Without dead ends: 238 [2021-08-21 12:15:50,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:15:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-21 12:15:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 169. [2021-08-21 12:15:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.982142857142857) internal successors, (501), 168 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-08-21 12:15:50,722 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-08-21 12:15:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-08-21 12:15:50,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-08-21 12:15:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:50,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:50,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:50,764 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 12:15:50,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:50,945 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1808245979, now seen corresponding path program 20 times [2021-08-21 12:15:50,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:50,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201224900] [2021-08-21 12:15:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:50,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:51,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:51,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201224900] [2021-08-21 12:15:51,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201224900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:51,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976855748] [2021-08-21 12:15:51,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:51,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:51,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:51,389 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 12:15:51,404 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 12:15:52,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:52,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:52,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:15:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:53,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:53,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:15:53,918 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2021-08-21 12:15:53,923 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 104 treesize of output 82 [2021-08-21 12:15:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:54,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976855748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:54,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:54,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:15:54,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125127600] [2021-08-21 12:15:54,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:15:54,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:54,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:15:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:54,173 INFO L87 Difference]: Start difference. First operand 169 states and 501 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:54,923 INFO L93 Difference]: Finished difference Result 208 states and 594 transitions. [2021-08-21 12:15:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:54,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:54,924 INFO L225 Difference]: With dead ends: 208 [2021-08-21 12:15:54,924 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 12:15:54,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 854.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 12:15:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 168. [2021-08-21 12:15:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9760479041916166) internal successors, (497), 167 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 497 transitions. [2021-08-21 12:15:54,927 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 497 transitions. Word has length 17 [2021-08-21 12:15:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:54,927 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 497 transitions. [2021-08-21 12:15:54,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 497 transitions. [2021-08-21 12:15:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:54,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:54,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:54,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 12:15:55,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:55,128 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash -874240347, now seen corresponding path program 21 times [2021-08-21 12:15:55,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:55,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633995887] [2021-08-21 12:15:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:55,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:55,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:55,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633995887] [2021-08-21 12:15:55,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633995887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:55,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844721440] [2021-08-21 12:15:55,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:55,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:55,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:55,427 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 12:15:55,452 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 12:15:56,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:15:56,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:15:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:57,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:57,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:15:57,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:57,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 127 [2021-08-21 12:15:57,534 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 127 treesize of output 103 [2021-08-21 12:15:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:58,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844721440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:58,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:58,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:15:58,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912478668] [2021-08-21 12:15:58,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:58,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:58,239 INFO L87 Difference]: Start difference. First operand 168 states and 497 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:59,374 INFO L93 Difference]: Finished difference Result 219 states and 625 transitions. [2021-08-21 12:15:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:15:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:59,375 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:15:59,375 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:15:59,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1114.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:15:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:15:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 163. [2021-08-21 12:15:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.9444444444444446) internal successors, (477), 162 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 477 transitions. [2021-08-21 12:15:59,378 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 477 transitions. Word has length 17 [2021-08-21 12:15:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:59,379 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 477 transitions. [2021-08-21 12:15:59,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 477 transitions. [2021-08-21 12:15:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:59,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:59,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:59,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 12:15:59,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 12:15:59,585 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1308007629, now seen corresponding path program 22 times [2021-08-21 12:15:59,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:59,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476087160] [2021-08-21 12:15:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:59,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:59,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:59,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476087160] [2021-08-21 12:15:59,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476087160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:59,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495892872] [2021-08-21 12:15:59,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:59,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:59,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:59,909 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 12:15:59,910 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 12:16:01,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:01,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:01,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:16:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:01,638 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:01,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2021-08-21 12:16:02,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 116 [2021-08-21 12:16:02,274 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:02,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2021-08-21 12:16:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:02,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495892872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:02,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:02,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:16:02,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931415783] [2021-08-21 12:16:02,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:02,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:02,782 INFO L87 Difference]: Start difference. First operand 163 states and 477 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:03,806 INFO L93 Difference]: Finished difference Result 235 states and 676 transitions. [2021-08-21 12:16:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:16:03,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:03,807 INFO L225 Difference]: With dead ends: 235 [2021-08-21 12:16:03,807 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:16:03,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 970.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:16:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:16:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-08-21 12:16:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-08-21 12:16:03,811 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-08-21 12:16:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:03,811 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-08-21 12:16:03,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-08-21 12:16:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:03,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:03,812 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:03,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 12:16:04,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:04,033 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2025861353, now seen corresponding path program 23 times [2021-08-21 12:16:04,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:04,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699244765] [2021-08-21 12:16:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:04,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:04,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:04,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699244765] [2021-08-21 12:16:04,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699244765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:04,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377149913] [2021-08-21 12:16:04,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:04,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:04,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:04,301 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 12:16:04,325 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 12:16:05,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:05,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:06,167 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 63 treesize of output 51 [2021-08-21 12:16:06,448 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 115 treesize of output 93 [2021-08-21 12:16:06,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 71 [2021-08-21 12:16:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:06,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377149913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:06,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:06,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-21 12:16:06,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233054314] [2021-08-21 12:16:06,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:16:06,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:16:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:16:06,672 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:07,079 INFO L93 Difference]: Finished difference Result 202 states and 587 transitions. [2021-08-21 12:16:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:16:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:07,081 INFO L225 Difference]: With dead ends: 202 [2021-08-21 12:16:07,081 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 12:16:07,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 12:16:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 169. [2021-08-21 12:16:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.9464285714285716) internal successors, (495), 168 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 495 transitions. [2021-08-21 12:16:07,084 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 495 transitions. Word has length 17 [2021-08-21 12:16:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:07,084 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 495 transitions. [2021-08-21 12:16:07,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 495 transitions. [2021-08-21 12:16:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:07,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:07,085 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:07,109 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 12:16:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:07,293 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash -290855849, now seen corresponding path program 24 times [2021-08-21 12:16:07,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:07,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613960273] [2021-08-21 12:16:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:07,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:07,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:07,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613960273] [2021-08-21 12:16:07,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613960273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:07,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588441042] [2021-08-21 12:16:07,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:07,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:07,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:07,566 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 12:16:07,567 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 12:16:09,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:16:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:09,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:16:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:09,423 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 48 treesize of output 38 [2021-08-21 12:16:09,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:16:09,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 115 [2021-08-21 12:16:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:16:09,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 91 [2021-08-21 12:16:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:10,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588441042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:10,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:10,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:16:10,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092081233] [2021-08-21 12:16:10,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:10,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:10,280 INFO L87 Difference]: Start difference. First operand 169 states and 495 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:10,834 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-08-21 12:16:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:16:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:10,836 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:16:10,836 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:16:10,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:16:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2021-08-21 12:16:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.947674418604651) internal successors, (507), 172 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2021-08-21 12:16:10,840 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 17 [2021-08-21 12:16:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:10,840 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2021-08-21 12:16:10,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2021-08-21 12:16:10,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:10,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:10,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:10,873 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 12:16:11,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:11,061 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1062951657, now seen corresponding path program 25 times [2021-08-21 12:16:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:11,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267741984] [2021-08-21 12:16:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:11,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:11,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:11,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267741984] [2021-08-21 12:16:11,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267741984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:11,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390479647] [2021-08-21 12:16:11,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:11,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:11,311 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 12:16:11,311 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 12:16:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:13,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:16:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:13,277 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:13,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-21 12:16:13,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2021-08-21 12:16:13,668 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2021-08-21 12:16:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:14,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390479647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:14,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:14,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:16:14,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117881136] [2021-08-21 12:16:14,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:14,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:14,256 INFO L87 Difference]: Start difference. First operand 173 states and 507 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:14,914 INFO L93 Difference]: Finished difference Result 203 states and 590 transitions. [2021-08-21 12:16:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:16:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:14,915 INFO L225 Difference]: With dead ends: 203 [2021-08-21 12:16:14,916 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 12:16:14,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 694.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 12:16:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 177. [2021-08-21 12:16:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-21 12:16:14,923 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-21 12:16:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:14,924 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-21 12:16:14,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-21 12:16:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:14,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:14,924 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:14,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 12:16:15,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:16:15,137 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1323600601, now seen corresponding path program 26 times [2021-08-21 12:16:15,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:15,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084608756] [2021-08-21 12:16:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:15,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:15,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:15,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084608756] [2021-08-21 12:16:15,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084608756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:15,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213794926] [2021-08-21 12:16:15,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:15,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:15,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:15,416 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 12:16:15,439 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 12:16:17,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:17,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:17,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:16:17,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:17,472 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:17,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:16:17,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 176 [2021-08-21 12:16:17,952 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:17,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 145 [2021-08-21 12:16:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:18,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213794926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:18,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:18,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:16:18,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046930529] [2021-08-21 12:16:18,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:18,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:18,858 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:19,588 INFO L93 Difference]: Finished difference Result 227 states and 639 transitions. [2021-08-21 12:16:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:16:19,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:19,589 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:16:19,589 INFO L226 Difference]: Without dead ends: 219 [2021-08-21 12:16:19,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-21 12:16:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-08-21 12:16:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9717514124293785) internal successors, (526), 177 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 526 transitions. [2021-08-21 12:16:19,592 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 526 transitions. Word has length 17 [2021-08-21 12:16:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:19,592 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 526 transitions. [2021-08-21 12:16:19,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 526 transitions. [2021-08-21 12:16:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:19,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:19,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:19,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 12:16:19,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:19,793 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1600923037, now seen corresponding path program 27 times [2021-08-21 12:16:19,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:19,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48156502] [2021-08-21 12:16:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:19,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:20,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:20,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48156502] [2021-08-21 12:16:20,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48156502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:20,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796489977] [2021-08-21 12:16:20,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:20,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:20,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:20,126 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 12:16:20,127 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 12:16:21,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:16:21,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:16:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:16:22,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:16:22,797 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:22,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2021-08-21 12:16:22,804 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:22,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-21 12:16:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796489977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:23,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:23,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:16:23,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141785727] [2021-08-21 12:16:23,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:23,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:23,044 INFO L87 Difference]: Start difference. First operand 178 states and 526 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:23,871 INFO L93 Difference]: Finished difference Result 206 states and 585 transitions. [2021-08-21 12:16:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:16:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:23,872 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:16:23,872 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 12:16:23,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 851.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:16:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 12:16:23,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 177. [2021-08-21 12:16:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.965909090909091) internal successors, (522), 176 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 522 transitions. [2021-08-21 12:16:23,875 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 522 transitions. Word has length 17 [2021-08-21 12:16:23,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:23,875 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 522 transitions. [2021-08-21 12:16:23,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 522 transitions. [2021-08-21 12:16:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:23,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:23,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:23,898 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 12:16:24,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:24,076 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:24,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1760038627, now seen corresponding path program 28 times [2021-08-21 12:16:24,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:24,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272027566] [2021-08-21 12:16:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:24,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:24,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:24,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272027566] [2021-08-21 12:16:24,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272027566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:24,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359293180] [2021-08-21 12:16:24,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:24,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:24,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:24,439 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 12:16:24,440 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 12:16:26,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:16:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:26,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:16:26,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:16:26,850 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 134 [2021-08-21 12:16:26,858 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:26,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 110 [2021-08-21 12:16:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:27,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359293180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:27,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:27,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:16:27,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156403214] [2021-08-21 12:16:27,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:27,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:27,446 INFO L87 Difference]: Start difference. First operand 177 states and 522 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:27,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:27,994 INFO L93 Difference]: Finished difference Result 213 states and 610 transitions. [2021-08-21 12:16:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:16:27,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:27,995 INFO L225 Difference]: With dead ends: 213 [2021-08-21 12:16:27,995 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 12:16:27,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 660.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:16:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 12:16:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2021-08-21 12:16:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.947976878612717) internal successors, (510), 173 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 510 transitions. [2021-08-21 12:16:27,998 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 510 transitions. Word has length 17 [2021-08-21 12:16:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:27,998 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 510 transitions. [2021-08-21 12:16:27,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 510 transitions. [2021-08-21 12:16:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:27,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:27,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:28,021 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 12:16:28,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-08-21 12:16:28,199 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash 967202623, now seen corresponding path program 29 times [2021-08-21 12:16:28,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:28,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732234810] [2021-08-21 12:16:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:28,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:28,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:28,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732234810] [2021-08-21 12:16:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732234810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:28,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995196614] [2021-08-21 12:16:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:28,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:28,564 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 12:16:28,565 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 12:16:30,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:16:30,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:30,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:16:30,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:30,686 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:30,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 94 [2021-08-21 12:16:32,783 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:32,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 110 [2021-08-21 12:16:32,790 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:32,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-21 12:16:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:32,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995196614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:32,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:32,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:16:32,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646524530] [2021-08-21 12:16:32,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:32,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:32,993 INFO L87 Difference]: Start difference. First operand 174 states and 510 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:33,480 INFO L93 Difference]: Finished difference Result 198 states and 571 transitions. [2021-08-21 12:16:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:16:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:33,485 INFO L225 Difference]: With dead ends: 198 [2021-08-21 12:16:33,485 INFO L226 Difference]: Without dead ends: 194 [2021-08-21 12:16:33,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:16:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-08-21 12:16:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 178. [2021-08-21 12:16:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9604519774011298) internal successors, (524), 177 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 524 transitions. [2021-08-21 12:16:33,488 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 524 transitions. Word has length 17 [2021-08-21 12:16:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:33,488 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 524 transitions. [2021-08-21 12:16:33,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 524 transitions. [2021-08-21 12:16:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:33,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:33,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:33,511 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 12:16:33,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:33,689 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1994373681, now seen corresponding path program 30 times [2021-08-21 12:16:33,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:33,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726378425] [2021-08-21 12:16:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:33,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:34,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:34,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726378425] [2021-08-21 12:16:34,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726378425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:34,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912034354] [2021-08-21 12:16:34,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:34,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:34,085 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 12:16:34,086 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 12:16:36,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:16:36,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:36,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:16:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:36,313 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:36,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 91 [2021-08-21 12:16:37,108 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:37,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 138 [2021-08-21 12:16:37,117 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:37,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 116 [2021-08-21 12:16:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912034354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:37,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:37,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:16:37,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840957422] [2021-08-21 12:16:37,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:37,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:37,835 INFO L87 Difference]: Start difference. First operand 178 states and 524 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:38,234 INFO L93 Difference]: Finished difference Result 209 states and 604 transitions. [2021-08-21 12:16:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:16:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:38,235 INFO L225 Difference]: With dead ends: 209 [2021-08-21 12:16:38,235 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 12:16:38,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:16:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 12:16:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2021-08-21 12:16:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-08-21 12:16:38,237 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-08-21 12:16:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:38,238 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-08-21 12:16:38,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-08-21 12:16:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:38,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:38,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:38,263 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 12:16:38,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:38,445 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:38,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1960774453, now seen corresponding path program 31 times [2021-08-21 12:16:38,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:38,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603035642] [2021-08-21 12:16:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:38,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:38,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:38,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603035642] [2021-08-21 12:16:38,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603035642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:38,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25336560] [2021-08-21 12:16:38,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:38,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:38,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:38,673 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 12:16:38,697 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 12:16:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:16:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:40,970 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 65 treesize of output 53 [2021-08-21 12:16:41,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:16:41,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 119 [2021-08-21 12:16:41,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:16:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 93 [2021-08-21 12:16:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:42,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25336560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:42,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:42,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:16:42,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009867052] [2021-08-21 12:16:42,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:42,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:42,002 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:42,259 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-08-21 12:16:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:42,260 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:16:42,260 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:16:42,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:16:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 174. [2021-08-21 12:16:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.947976878612717) internal successors, (510), 173 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 510 transitions. [2021-08-21 12:16:42,262 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 510 transitions. Word has length 17 [2021-08-21 12:16:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:42,262 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 510 transitions. [2021-08-21 12:16:42,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 510 transitions. [2021-08-21 12:16:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:42,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:42,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:42,285 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 12:16:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:42,464 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1322796811, now seen corresponding path program 32 times [2021-08-21 12:16:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:42,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352852462] [2021-08-21 12:16:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:42,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:42,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:42,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352852462] [2021-08-21 12:16:42,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352852462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:42,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945452539] [2021-08-21 12:16:42,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:42,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:42,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:42,838 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 12:16:42,838 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 12:16:44,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:44,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:44,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:16:44,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:45,128 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:45,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:16:46,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-21 12:16:46,125 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:46,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-21 12:16:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945452539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:46,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:46,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:16:46,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947522368] [2021-08-21 12:16:46,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:46,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:46,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:46,818 INFO L87 Difference]: Start difference. First operand 174 states and 510 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:47,548 INFO L93 Difference]: Finished difference Result 209 states and 599 transitions. [2021-08-21 12:16:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:16:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:47,549 INFO L225 Difference]: With dead ends: 209 [2021-08-21 12:16:47,549 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 12:16:47,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 737.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 12:16:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 176. [2021-08-21 12:16:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-08-21 12:16:47,552 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-08-21 12:16:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:47,552 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-08-21 12:16:47,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-08-21 12:16:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:47,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:47,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:47,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 12:16:47,753 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,SelfDestructingSolverStorable84 [2021-08-21 12:16:47,753 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash -980213299, now seen corresponding path program 33 times [2021-08-21 12:16:47,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:47,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692561969] [2021-08-21 12:16:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:47,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:48,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:48,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692561969] [2021-08-21 12:16:48,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692561969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:48,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600845374] [2021-08-21 12:16:48,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:48,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:48,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:48,001 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 12:16:48,002 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 12:16:50,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:16:50,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:50,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:16:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:50,337 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:50,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2021-08-21 12:16:50,584 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:50,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 106 [2021-08-21 12:16:50,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:16:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2021-08-21 12:16:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:51,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600845374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:51,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:51,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:16:51,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105821103] [2021-08-21 12:16:51,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:16:51,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:51,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:16:51,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:51,110 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:51,745 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-08-21 12:16:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:16:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:51,746 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:16:51,746 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:16:51,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:16:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:16:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-08-21 12:16:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-08-21 12:16:51,749 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-08-21 12:16:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:51,749 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-08-21 12:16:51,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-08-21 12:16:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:51,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:51,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:51,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 12:16:51,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 12:16:51,953 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1095855107, now seen corresponding path program 34 times [2021-08-21 12:16:51,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:51,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255394072] [2021-08-21 12:16:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:51,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:52,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:52,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255394072] [2021-08-21 12:16:52,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255394072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:52,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319363360] [2021-08-21 12:16:52,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:52,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:52,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:52,232 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 12:16:52,257 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 12:16:54,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:54,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:16:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:54,820 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:54,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-21 12:16:55,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2021-08-21 12:16:55,193 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:55,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2021-08-21 12:16:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:55,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319363360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:55,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:55,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:16:55,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949802599] [2021-08-21 12:16:55,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:55,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:55,812 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:57,002 INFO L93 Difference]: Finished difference Result 242 states and 703 transitions. [2021-08-21 12:16:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:16:57,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:57,003 INFO L225 Difference]: With dead ends: 242 [2021-08-21 12:16:57,003 INFO L226 Difference]: Without dead ends: 238 [2021-08-21 12:16:57,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1050.0ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:16:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-21 12:16:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 183. [2021-08-21 12:16:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-21 12:16:57,006 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-21 12:16:57,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:57,006 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-21 12:16:57,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-21 12:16:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:57,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:57,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:57,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:57,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-21 12:16:57,207 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash 835206163, now seen corresponding path program 35 times [2021-08-21 12:16:57,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:57,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828698278] [2021-08-21 12:16:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:57,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:57,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:57,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828698278] [2021-08-21 12:16:57,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828698278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:57,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801804044] [2021-08-21 12:16:57,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:57,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:57,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:57,449 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 12:16:57,471 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 12:16:59,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:16:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:16:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:00,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:00,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-21 12:17:00,827 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:00,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 114 [2021-08-21 12:17:00,834 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:00,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 88 [2021-08-21 12:17:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801804044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:01,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:01,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:17:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416646783] [2021-08-21 12:17:01,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:17:01,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:17:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:01,170 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:01,658 INFO L93 Difference]: Finished difference Result 224 states and 645 transitions. [2021-08-21 12:17:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:01,659 INFO L225 Difference]: With dead ends: 224 [2021-08-21 12:17:01,659 INFO L226 Difference]: Without dead ends: 220 [2021-08-21 12:17:01,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-21 12:17:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 183. [2021-08-21 12:17:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-21 12:17:01,663 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-21 12:17:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:01,663 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-21 12:17:01,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-21 12:17:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:01,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:01,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:01,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 12:17:01,872 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,SelfDestructingSolverStorable87 [2021-08-21 12:17:01,873 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash -480951141, now seen corresponding path program 36 times [2021-08-21 12:17:01,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:01,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377088140] [2021-08-21 12:17:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:01,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:02,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:02,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377088140] [2021-08-21 12:17:02,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377088140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:02,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518182020] [2021-08-21 12:17:02,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:02,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:02,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:02,100 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 12:17:02,101 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 12:17:04,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:17:04,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:17:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:04,790 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:04,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-21 12:17:05,719 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:05,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 114 [2021-08-21 12:17:05,726 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 88 [2021-08-21 12:17:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:06,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518182020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:06,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:06,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:17:06,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487695938] [2021-08-21 12:17:06,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:17:06,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:17:06,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:06,040 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:06,614 INFO L93 Difference]: Finished difference Result 252 states and 711 transitions. [2021-08-21 12:17:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:06,616 INFO L225 Difference]: With dead ends: 252 [2021-08-21 12:17:06,616 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:17:06,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:17:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 181. [2021-08-21 12:17:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9555555555555557) internal successors, (532), 180 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 532 transitions. [2021-08-21 12:17:06,619 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 532 transitions. Word has length 17 [2021-08-21 12:17:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:06,619 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 532 transitions. [2021-08-21 12:17:06,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:06,619 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 532 transitions. [2021-08-21 12:17:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:06,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:06,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:06,645 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 12:17:06,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:06,824 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:06,825 INFO L82 PathProgramCache]: Analyzing trace with hash -222124561, now seen corresponding path program 37 times [2021-08-21 12:17:06,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:06,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254121285] [2021-08-21 12:17:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:06,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:07,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:07,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254121285] [2021-08-21 12:17:07,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254121285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:07,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240081613] [2021-08-21 12:17:07,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:07,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:07,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:07,139 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 12:17:07,140 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 12:17:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:17:09,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:09,818 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:09,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:17:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-21 12:17:10,309 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:10,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-21 12:17:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:11,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240081613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:11,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:11,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:17:11,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173286552] [2021-08-21 12:17:11,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:11,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:11,107 INFO L87 Difference]: Start difference. First operand 181 states and 532 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:11,908 INFO L93 Difference]: Finished difference Result 269 states and 753 transitions. [2021-08-21 12:17:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:11,909 INFO L225 Difference]: With dead ends: 269 [2021-08-21 12:17:11,909 INFO L226 Difference]: Without dead ends: 261 [2021-08-21 12:17:11,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 727.2ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:17:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-21 12:17:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 182. [2021-08-21 12:17:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.977900552486188) internal successors, (539), 181 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 539 transitions. [2021-08-21 12:17:11,912 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 539 transitions. Word has length 17 [2021-08-21 12:17:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:11,912 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 539 transitions. [2021-08-21 12:17:11,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 539 transitions. [2021-08-21 12:17:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:11,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:11,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:11,941 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 12:17:12,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:12,125 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1592568219, now seen corresponding path program 38 times [2021-08-21 12:17:12,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:12,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728393234] [2021-08-21 12:17:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:12,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:12,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:12,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728393234] [2021-08-21 12:17:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728393234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:12,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166767417] [2021-08-21 12:17:12,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:12,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:12,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:12,467 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 12:17:12,468 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 12:17:14,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:14,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:17:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:15,166 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:15,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 76 [2021-08-21 12:17:17,098 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:17,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 112 [2021-08-21 12:17:17,106 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:17,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 92 [2021-08-21 12:17:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:17,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166767417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:17,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:17,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:17:17,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386055635] [2021-08-21 12:17:17,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:17,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:17,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:17,395 INFO L87 Difference]: Start difference. First operand 182 states and 539 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:17,893 INFO L93 Difference]: Finished difference Result 230 states and 658 transitions. [2021-08-21 12:17:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:17,894 INFO L225 Difference]: With dead ends: 230 [2021-08-21 12:17:17,895 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 12:17:17,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 12:17:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 181. [2021-08-21 12:17:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9722222222222223) internal successors, (535), 180 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 535 transitions. [2021-08-21 12:17:17,897 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 535 transitions. Word has length 17 [2021-08-21 12:17:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:17,897 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 535 transitions. [2021-08-21 12:17:17,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 535 transitions. [2021-08-21 12:17:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:17,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:17,898 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:17,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:18,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:18,099 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash -658562587, now seen corresponding path program 39 times [2021-08-21 12:17:18,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:18,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285477180] [2021-08-21 12:17:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:18,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285477180] [2021-08-21 12:17:18,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285477180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:18,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158743638] [2021-08-21 12:17:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:18,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:18,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:18,405 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 12:17:18,405 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 12:17:20,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:17:20,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:20,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:17:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:21,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:17:21,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:17:21,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:17:21,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2021-08-21 12:17:21,299 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 100 treesize of output 80 [2021-08-21 12:17:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:21,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158743638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:21,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:21,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:17:21,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602565901] [2021-08-21 12:17:21,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:21,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:21,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:21,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:21,843 INFO L87 Difference]: Start difference. First operand 181 states and 535 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:22,954 INFO L93 Difference]: Finished difference Result 242 states and 692 transitions. [2021-08-21 12:17:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:22,955 INFO L225 Difference]: With dead ends: 242 [2021-08-21 12:17:22,955 INFO L226 Difference]: Without dead ends: 238 [2021-08-21 12:17:22,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1055.3ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:17:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-21 12:17:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-08-21 12:17:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9548022598870056) internal successors, (523), 177 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 523 transitions. [2021-08-21 12:17:22,958 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 523 transitions. Word has length 17 [2021-08-21 12:17:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:22,958 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 523 transitions. [2021-08-21 12:17:22,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 523 transitions. [2021-08-21 12:17:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:22,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:22,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:22,985 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 12:17:23,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:23,159 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269449, now seen corresponding path program 40 times [2021-08-21 12:17:23,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:23,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539467279] [2021-08-21 12:17:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:23,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:23,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:23,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539467279] [2021-08-21 12:17:23,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539467279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:23,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629273533] [2021-08-21 12:17:23,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:23,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:23,528 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 12:17:23,547 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 12:17:26,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:26,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:17:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:26,226 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 80 [2021-08-21 12:17:27,815 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:27,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 189 [2021-08-21 12:17:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-21 12:17:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:28,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629273533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:28,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:28,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:17:28,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610243860] [2021-08-21 12:17:28,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:28,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:28,675 INFO L87 Difference]: Start difference. First operand 178 states and 523 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,494 INFO L93 Difference]: Finished difference Result 297 states and 840 transitions. [2021-08-21 12:17:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:17:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,495 INFO L225 Difference]: With dead ends: 297 [2021-08-21 12:17:29,495 INFO L226 Difference]: Without dead ends: 293 [2021-08-21 12:17:29,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:17:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-21 12:17:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 184. [2021-08-21 12:17:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.989071038251366) internal successors, (547), 183 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 547 transitions. [2021-08-21 12:17:29,498 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 547 transitions. Word has length 17 [2021-08-21 12:17:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,499 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 547 transitions. [2021-08-21 12:17:29,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 547 transitions. [2021-08-21 12:17:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:29,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:29,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:29,715 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2015195721, now seen corresponding path program 41 times [2021-08-21 12:17:29,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564174388] [2021-08-21 12:17:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:30,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:30,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564174388] [2021-08-21 12:17:30,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564174388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:30,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016728511] [2021-08-21 12:17:30,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:30,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:30,105 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 12:17:30,130 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 12:17:32,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:17:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:33,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:17:33,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:17:33,801 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:33,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 116 [2021-08-21 12:17:33,803 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 113 treesize of output 91 [2021-08-21 12:17:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016728511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:34,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:34,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:17:34,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921930745] [2021-08-21 12:17:34,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:34,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:34,105 INFO L87 Difference]: Start difference. First operand 184 states and 547 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:36,444 INFO L93 Difference]: Finished difference Result 323 states and 888 transitions. [2021-08-21 12:17:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:17:36,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:36,445 INFO L225 Difference]: With dead ends: 323 [2021-08-21 12:17:36,445 INFO L226 Difference]: Without dead ends: 315 [2021-08-21 12:17:36,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2189.4ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:17:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-21 12:17:36,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 180. [2021-08-21 12:17:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9664804469273744) internal successors, (531), 179 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 531 transitions. [2021-08-21 12:17:36,448 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 531 transitions. Word has length 17 [2021-08-21 12:17:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:36,448 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 531 transitions. [2021-08-21 12:17:36,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 531 transitions. [2021-08-21 12:17:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:36,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:36,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:36,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 12:17:36,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-21 12:17:36,649 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -713843937, now seen corresponding path program 42 times [2021-08-21 12:17:36,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:36,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215696550] [2021-08-21 12:17:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:36,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:36,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:36,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215696550] [2021-08-21 12:17:36,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215696550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:36,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055371204] [2021-08-21 12:17:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:36,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:36,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:36,995 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 12:17:36,997 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 12:17:39,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:17:39,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:39,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:17:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:39,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:17:39,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:17:40,738 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:40,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 110 [2021-08-21 12:17:40,740 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 107 treesize of output 85 [2021-08-21 12:17:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:41,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055371204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:41,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:41,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:17:41,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028242224] [2021-08-21 12:17:41,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:41,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:41,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:41,007 INFO L87 Difference]: Start difference. First operand 180 states and 531 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:43,314 INFO L93 Difference]: Finished difference Result 289 states and 809 transitions. [2021-08-21 12:17:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:17:43,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:43,315 INFO L225 Difference]: With dead ends: 289 [2021-08-21 12:17:43,315 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 12:17:43,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2160.2ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:17:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 12:17:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-08-21 12:17:43,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-21 12:17:43,318 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-21 12:17:43,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:43,318 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-21 12:17:43,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:43,318 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-21 12:17:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:43,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:43,319 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:43,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 12:17:43,519 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,SelfDestructingSolverStorable94 [2021-08-21 12:17:43,520 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1964558461, now seen corresponding path program 43 times [2021-08-21 12:17:43,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:43,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268993964] [2021-08-21 12:17:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:43,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:43,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:43,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268993964] [2021-08-21 12:17:43,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268993964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:43,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703773371] [2021-08-21 12:17:43,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:43,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:43,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:43,825 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 12:17:43,826 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 12:17:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:46,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:17:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:46,843 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:46,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-21 12:17:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2021-08-21 12:17:47,239 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:47,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2021-08-21 12:17:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:47,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703773371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:47,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:47,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:17:47,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885181473] [2021-08-21 12:17:47,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:47,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:47,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:47,767 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:48,446 INFO L93 Difference]: Finished difference Result 207 states and 602 transitions. [2021-08-21 12:17:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:48,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:48,447 INFO L225 Difference]: With dead ends: 207 [2021-08-21 12:17:48,447 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 12:17:48,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 12:17:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2021-08-21 12:17:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-08-21 12:17:48,450 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-08-21 12:17:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:48,450 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-08-21 12:17:48,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-08-21 12:17:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:48,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:48,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:48,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 12:17:48,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:48,652 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:48,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:48,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1703909517, now seen corresponding path program 44 times [2021-08-21 12:17:48,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:48,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825248826] [2021-08-21 12:17:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:48,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:48,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:48,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825248826] [2021-08-21 12:17:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825248826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:48,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572046236] [2021-08-21 12:17:48,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:48,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:48,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:48,885 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 12:17:48,886 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 12:17:51,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:51,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:17:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:52,014 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:52,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:17:52,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-21 12:17:52,503 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:52,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-21 12:17:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:53,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572046236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:53,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:53,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:17:53,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098164438] [2021-08-21 12:17:53,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:53,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:53,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:53,502 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:54,226 INFO L93 Difference]: Finished difference Result 231 states and 651 transitions. [2021-08-21 12:17:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:17:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:54,227 INFO L225 Difference]: With dead ends: 231 [2021-08-21 12:17:54,227 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 12:17:54,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 12:17:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 182. [2021-08-21 12:17:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.972375690607735) internal successors, (538), 181 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 538 transitions. [2021-08-21 12:17:54,230 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 538 transitions. Word has length 17 [2021-08-21 12:17:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:54,230 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 538 transitions. [2021-08-21 12:17:54,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 538 transitions. [2021-08-21 12:17:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:54,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:54,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:54,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 12:17:54,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:54,431 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash 333465859, now seen corresponding path program 45 times [2021-08-21 12:17:54,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:54,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595856463] [2021-08-21 12:17:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:54,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:54,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:54,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595856463] [2021-08-21 12:17:54,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595856463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:54,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415425778] [2021-08-21 12:17:54,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:54,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:54,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:54,747 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 12:17:54,747 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 12:17:57,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:17:57,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:17:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:57,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:17:57,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:17:58,473 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:58,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-21 12:17:58,475 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 99 treesize of output 79 [2021-08-21 12:17:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:58,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415425778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:58,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:58,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:17:58,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068634712] [2021-08-21 12:17:58,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:58,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:58,702 INFO L87 Difference]: Start difference. First operand 182 states and 538 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:59,550 INFO L93 Difference]: Finished difference Result 210 states and 597 transitions. [2021-08-21 12:17:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:17:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:59,551 INFO L225 Difference]: With dead ends: 210 [2021-08-21 12:17:59,551 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:17:59,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 855.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:17:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2021-08-21 12:17:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.966666666666667) internal successors, (534), 180 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 534 transitions. [2021-08-21 12:17:59,554 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 534 transitions. Word has length 17 [2021-08-21 12:17:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:59,554 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 534 transitions. [2021-08-21 12:17:59,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 534 transitions. [2021-08-21 12:17:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:59,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:59,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:59,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:59,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:59,769 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1267471491, now seen corresponding path program 46 times [2021-08-21 12:17:59,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:59,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365135690] [2021-08-21 12:17:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:59,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:00,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:00,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365135690] [2021-08-21 12:18:00,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365135690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:00,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437284228] [2021-08-21 12:18:00,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:00,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:00,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:00,194 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 12:18:00,220 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 12:18:03,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:03,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:03,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:18:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:03,258 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:03,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 73 [2021-08-21 12:18:03,854 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:03,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 134 [2021-08-21 12:18:03,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2021-08-21 12:18:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:04,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437284228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:04,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:04,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:18:04,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672759735] [2021-08-21 12:18:04,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:04,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:04,484 INFO L87 Difference]: Start difference. First operand 181 states and 534 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:04,919 INFO L93 Difference]: Finished difference Result 217 states and 622 transitions. [2021-08-21 12:18:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:04,920 INFO L225 Difference]: With dead ends: 217 [2021-08-21 12:18:04,920 INFO L226 Difference]: Without dead ends: 213 [2021-08-21 12:18:04,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-21 12:18:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 178. [2021-08-21 12:18:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-08-21 12:18:04,923 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 17 [2021-08-21 12:18:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:04,923 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-08-21 12:18:04,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-08-21 12:18:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:04,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:04,923 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:04,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:18:05,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:05,124 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:05,124 INFO L82 PathProgramCache]: Analyzing trace with hash -300254555, now seen corresponding path program 47 times [2021-08-21 12:18:05,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:05,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692264126] [2021-08-21 12:18:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:05,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:05,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:05,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692264126] [2021-08-21 12:18:05,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692264126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:05,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466105205] [2021-08-21 12:18:05,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:05,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:05,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:05,470 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 12:18:05,470 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 12:18:08,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:18:08,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:08,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:18:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:08,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:08,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2021-08-21 12:18:09,657 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:09,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 114 [2021-08-21 12:18:09,664 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:09,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2021-08-21 12:18:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:09,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466105205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:09,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:09,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:18:09,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402495521] [2021-08-21 12:18:09,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:09,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:09,863 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:10,605 INFO L93 Difference]: Finished difference Result 202 states and 583 transitions. [2021-08-21 12:18:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:10,606 INFO L225 Difference]: With dead ends: 202 [2021-08-21 12:18:10,606 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 12:18:10,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 12:18:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 182. [2021-08-21 12:18:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9613259668508287) internal successors, (536), 181 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 536 transitions. [2021-08-21 12:18:10,613 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 536 transitions. Word has length 17 [2021-08-21 12:18:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:10,613 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 536 transitions. [2021-08-21 12:18:10,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 536 transitions. [2021-08-21 12:18:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:10,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:10,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:10,650 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 12:18:10,838 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,SelfDestructingSolverStorable99 [2021-08-21 12:18:10,839 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash 726916503, now seen corresponding path program 48 times [2021-08-21 12:18:10,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:10,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948954403] [2021-08-21 12:18:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:10,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:11,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:11,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948954403] [2021-08-21 12:18:11,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948954403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:11,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160240029] [2021-08-21 12:18:11,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:11,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:11,305 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 12:18:11,306 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 12:18:14,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:18:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:14,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:14,467 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:14,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 63 [2021-08-21 12:18:14,746 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 105 [2021-08-21 12:18:14,749 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 102 treesize of output 80 [2021-08-21 12:18:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:15,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160240029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:15,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:15,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:18:15,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864498501] [2021-08-21 12:18:15,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:15,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:15,139 INFO L87 Difference]: Start difference. First operand 182 states and 536 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:15,563 INFO L93 Difference]: Finished difference Result 213 states and 616 transitions. [2021-08-21 12:18:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:18:15,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:15,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:15,564 INFO L225 Difference]: With dead ends: 213 [2021-08-21 12:18:15,564 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 12:18:15,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 12:18:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 180. [2021-08-21 12:18:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-21 12:18:15,567 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-21 12:18:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:15,567 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-21 12:18:15,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-21 12:18:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:15,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:15,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:15,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:15,768 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,SelfDestructingSolverStorable100 [2021-08-21 12:18:15,768 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:15,768 INFO L82 PathProgramCache]: Analyzing trace with hash 693317275, now seen corresponding path program 49 times [2021-08-21 12:18:15,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:15,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150767925] [2021-08-21 12:18:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:15,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:16,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:16,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150767925] [2021-08-21 12:18:16,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150767925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:16,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823354784] [2021-08-21 12:18:16,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:16,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:16,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:16,052 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 12:18:16,053 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 12:18:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:19,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:18:19,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:19,229 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 65 treesize of output 53 [2021-08-21 12:18:19,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:19,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 119 [2021-08-21 12:18:19,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:19,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 93 [2021-08-21 12:18:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:20,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823354784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:20,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:20,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:18:20,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635502334] [2021-08-21 12:18:20,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:20,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:20,115 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:20,412 INFO L93 Difference]: Finished difference Result 203 states and 591 transitions. [2021-08-21 12:18:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:18:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:20,413 INFO L225 Difference]: With dead ends: 203 [2021-08-21 12:18:20,413 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 12:18:20,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 12:18:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-08-21 12:18:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-08-21 12:18:20,416 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 17 [2021-08-21 12:18:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:20,416 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-08-21 12:18:20,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-08-21 12:18:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:20,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:20,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:20,443 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 12:18:20,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 12:18:20,618 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1704713307, now seen corresponding path program 50 times [2021-08-21 12:18:20,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:20,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715204948] [2021-08-21 12:18:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:20,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:21,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:21,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715204948] [2021-08-21 12:18:21,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715204948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:21,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491971741] [2021-08-21 12:18:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:21,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:21,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:21,008 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 12:18:21,008 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 12:18:24,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:24,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:18:24,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:24,296 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:24,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:18:25,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:25,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 178 [2021-08-21 12:18:25,330 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 147 [2021-08-21 12:18:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:26,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491971741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:26,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:26,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:18:26,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295486927] [2021-08-21 12:18:26,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:26,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:26,299 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:27,119 INFO L93 Difference]: Finished difference Result 213 states and 611 transitions. [2021-08-21 12:18:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:18:27,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:27,120 INFO L225 Difference]: With dead ends: 213 [2021-08-21 12:18:27,120 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 12:18:27,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 786.4ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:18:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 12:18:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 180. [2021-08-21 12:18:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-21 12:18:27,123 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-21 12:18:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:27,123 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-21 12:18:27,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-21 12:18:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:27,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:27,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:27,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 12:18:27,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:18:27,337 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2047296819, now seen corresponding path program 51 times [2021-08-21 12:18:27,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:27,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101150985] [2021-08-21 12:18:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:27,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:27,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:27,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101150985] [2021-08-21 12:18:27,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101150985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:27,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916506694] [2021-08-21 12:18:27,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:27,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:27,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:27,616 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 12:18:27,617 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 12:18:30,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:18:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:30,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:18:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:30,919 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 51 treesize of output 41 [2021-08-21 12:18:31,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2021-08-21 12:18:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 63 [2021-08-21 12:18:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:31,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916506694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:31,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:31,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:18:31,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771333167] [2021-08-21 12:18:31,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:31,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:31,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:31,747 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:32,373 INFO L93 Difference]: Finished difference Result 203 states and 591 transitions. [2021-08-21 12:18:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:32,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:32,374 INFO L225 Difference]: With dead ends: 203 [2021-08-21 12:18:32,374 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 12:18:32,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:18:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 12:18:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 177. [2021-08-21 12:18:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-21 12:18:32,377 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-21 12:18:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:32,377 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-21 12:18:32,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-21 12:18:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:32,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:32,377 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:32,420 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 12:18:32,592 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,SelfDestructingSolverStorable103 [2021-08-21 12:18:32,593 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash -456033651, now seen corresponding path program 52 times [2021-08-21 12:18:32,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:32,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111091458] [2021-08-21 12:18:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:32,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:32,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:32,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111091458] [2021-08-21 12:18:32,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111091458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:32,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552521416] [2021-08-21 12:18:32,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:32,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:32,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:32,865 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 12:18:32,865 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 12:18:36,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:36,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:18:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:36,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:36,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:18:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 176 [2021-08-21 12:18:37,608 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:37,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 145 [2021-08-21 12:18:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552521416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:38,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:38,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:18:38,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812494166] [2021-08-21 12:18:38,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:38,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:38,534 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:40,411 INFO L93 Difference]: Finished difference Result 280 states and 792 transitions. [2021-08-21 12:18:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:18:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:40,412 INFO L225 Difference]: With dead ends: 280 [2021-08-21 12:18:40,412 INFO L226 Difference]: Without dead ends: 272 [2021-08-21 12:18:40,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1809.8ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:18:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-21 12:18:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 184. [2021-08-21 12:18:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.978142076502732) internal successors, (545), 183 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 545 transitions. [2021-08-21 12:18:40,416 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 545 transitions. Word has length 17 [2021-08-21 12:18:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:40,416 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 545 transitions. [2021-08-21 12:18:40,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 545 transitions. [2021-08-21 12:18:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:40,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:40,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:40,448 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 12:18:40,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:40,633 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1635850755, now seen corresponding path program 53 times [2021-08-21 12:18:40,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:40,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592511269] [2021-08-21 12:18:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:40,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:40,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:40,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592511269] [2021-08-21 12:18:40,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592511269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:40,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496209087] [2021-08-21 12:18:40,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:40,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:40,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:40,933 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 12:18:40,934 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 12:18:44,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:18:44,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:44,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:18:44,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:44,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:44,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:18:45,251 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:45,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 105 [2021-08-21 12:18:45,253 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 102 treesize of output 82 [2021-08-21 12:18:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:45,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496209087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:45,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:45,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:18:45,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016843246] [2021-08-21 12:18:45,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:45,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:45,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:45,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:45,454 INFO L87 Difference]: Start difference. First operand 184 states and 545 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:46,605 INFO L93 Difference]: Finished difference Result 276 states and 781 transitions. [2021-08-21 12:18:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:18:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:46,606 INFO L225 Difference]: With dead ends: 276 [2021-08-21 12:18:46,606 INFO L226 Difference]: Without dead ends: 268 [2021-08-21 12:18:46,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1102.1ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-21 12:18:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 179. [2021-08-21 12:18:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-21 12:18:46,609 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-21 12:18:46,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:46,609 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-21 12:18:46,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-21 12:18:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:46,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:46,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:46,636 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 12:18:46,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:46,810 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:46,810 INFO L82 PathProgramCache]: Analyzing trace with hash 818915027, now seen corresponding path program 54 times [2021-08-21 12:18:46,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:46,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070690988] [2021-08-21 12:18:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:46,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:47,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:47,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070690988] [2021-08-21 12:18:47,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070690988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:47,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062665887] [2021-08-21 12:18:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:47,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:47,068 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 12:18:47,096 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 12:18:50,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:18:50,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:18:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:50,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:50,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:18:51,163 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:51,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2021-08-21 12:18:51,166 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 105 treesize of output 85 [2021-08-21 12:18:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:51,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062665887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:51,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:51,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:18:51,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163389597] [2021-08-21 12:18:51,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:51,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:51,408 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:52,079 INFO L93 Difference]: Finished difference Result 224 states and 646 transitions. [2021-08-21 12:18:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:18:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:52,079 INFO L225 Difference]: With dead ends: 224 [2021-08-21 12:18:52,080 INFO L226 Difference]: Without dead ends: 216 [2021-08-21 12:18:52,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 590.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:18:52,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-21 12:18:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 181. [2021-08-21 12:18:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-08-21 12:18:52,082 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-08-21 12:18:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-08-21 12:18:52,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-08-21 12:18:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:52,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:52,082 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:52,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:18:52,283 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,SelfDestructingSolverStorable106 [2021-08-21 12:18:52,283 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:52,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:52,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1161498539, now seen corresponding path program 55 times [2021-08-21 12:18:52,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:52,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236718382] [2021-08-21 12:18:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:52,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:52,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:52,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236718382] [2021-08-21 12:18:52,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236718382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:52,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355353162] [2021-08-21 12:18:52,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:52,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:52,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:52,536 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 12:18:52,536 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 12:18:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:55,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:18:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:56,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:18:56,314 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:56,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 111 [2021-08-21 12:18:56,323 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:56,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 91 [2021-08-21 12:18:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355353162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:57,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:57,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:18:57,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616662577] [2021-08-21 12:18:57,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:57,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:57,299 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:58,334 INFO L93 Difference]: Finished difference Result 219 states and 629 transitions. [2021-08-21 12:18:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:18:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:58,335 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:18:58,335 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 12:18:58,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 971.8ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:18:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 12:18:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 179. [2021-08-21 12:18:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-21 12:18:58,337 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-21 12:18:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:58,338 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-21 12:18:58,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-21 12:18:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:58,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:58,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:58,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 12:18:58,544 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,SelfDestructingSolverStorable107 [2021-08-21 12:18:58,545 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2133699761, now seen corresponding path program 56 times [2021-08-21 12:18:58,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:58,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554852131] [2021-08-21 12:18:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:58,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:58,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:58,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554852131] [2021-08-21 12:18:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554852131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:58,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154250261] [2021-08-21 12:18:58,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:58,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:58,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:58,824 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 12:18:58,832 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 12:19:02,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:02,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:02,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:19:02,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:02,721 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:02,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-08-21 12:19:03,309 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:03,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-21 12:19:03,316 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:03,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-21 12:19:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:03,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154250261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:03,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:03,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:19:03,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237675371] [2021-08-21 12:19:03,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:03,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:03,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:03,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:03,423 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:03,919 INFO L93 Difference]: Finished difference Result 240 states and 674 transitions. [2021-08-21 12:19:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:03,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:03,920 INFO L225 Difference]: With dead ends: 240 [2021-08-21 12:19:03,920 INFO L226 Difference]: Without dead ends: 236 [2021-08-21 12:19:03,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:19:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-21 12:19:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2021-08-21 12:19:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9508196721311477) internal successors, (540), 183 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-08-21 12:19:03,923 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-08-21 12:19:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:03,924 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-08-21 12:19:03,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-08-21 12:19:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:03,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:03,924 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:03,961 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 12:19:04,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:04,141 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:04,141 INFO L82 PathProgramCache]: Analyzing trace with hash 212201181, now seen corresponding path program 57 times [2021-08-21 12:19:04,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:04,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385879655] [2021-08-21 12:19:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:04,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:04,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:04,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385879655] [2021-08-21 12:19:04,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385879655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:04,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758275947] [2021-08-21 12:19:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:04,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:04,465 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 12:19:04,465 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 12:19:07,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:19:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:19:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:08,496 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:08,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-08-21 12:19:09,008 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:09,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-21 12:19:09,015 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:09,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-21 12:19:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:09,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758275947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:09,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:09,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:19:09,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077431099] [2021-08-21 12:19:09,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:09,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:09,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:09,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:09,122 INFO L87 Difference]: Start difference. First operand 184 states and 540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:09,593 INFO L93 Difference]: Finished difference Result 217 states and 624 transitions. [2021-08-21 12:19:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:09,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:09,594 INFO L225 Difference]: With dead ends: 217 [2021-08-21 12:19:09,594 INFO L226 Difference]: Without dead ends: 213 [2021-08-21 12:19:09,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:19:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-21 12:19:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-08-21 12:19:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.945945945945946) internal successors, (545), 185 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 545 transitions. [2021-08-21 12:19:09,597 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 545 transitions. Word has length 17 [2021-08-21 12:19:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:09,597 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 545 transitions. [2021-08-21 12:19:09,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 545 transitions. [2021-08-21 12:19:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:09,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:09,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:09,626 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 12:19:09,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:09,798 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash -48447763, now seen corresponding path program 58 times [2021-08-21 12:19:09,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:09,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201763156] [2021-08-21 12:19:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:09,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:10,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:10,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201763156] [2021-08-21 12:19:10,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201763156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:10,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809011810] [2021-08-21 12:19:10,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:10,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:10,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:10,070 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 12:19:10,070 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 12:19:13,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:13,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:19:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:19:14,103 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 218 treesize of output 180 [2021-08-21 12:19:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-21 12:19:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809011810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:14,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:14,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:19:14,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247953381] [2021-08-21 12:19:14,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:19:14,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:14,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:19:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:19:14,923 INFO L87 Difference]: Start difference. First operand 186 states and 545 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:16,328 INFO L93 Difference]: Finished difference Result 250 states and 706 transitions. [2021-08-21 12:19:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:19:16,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:16,330 INFO L225 Difference]: With dead ends: 250 [2021-08-21 12:19:16,330 INFO L226 Difference]: Without dead ends: 242 [2021-08-21 12:19:16,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1335.8ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:19:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-21 12:19:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 187. [2021-08-21 12:19:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.978494623655914) internal successors, (554), 186 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 554 transitions. [2021-08-21 12:19:16,332 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 554 transitions. Word has length 17 [2021-08-21 12:19:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:16,333 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 554 transitions. [2021-08-21 12:19:16,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 554 transitions. [2021-08-21 12:19:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:16,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:16,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:16,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 12:19:16,534 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,SelfDestructingSolverStorable110 [2021-08-21 12:19:16,534 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1114439915, now seen corresponding path program 59 times [2021-08-21 12:19:16,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:16,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412014259] [2021-08-21 12:19:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:16,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:16,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:16,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412014259] [2021-08-21 12:19:16,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412014259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:16,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326927345] [2021-08-21 12:19:16,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:16,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:16,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:16,839 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 12:19:16,871 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 12:19:20,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:19:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:20,756 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 53 treesize of output 43 [2021-08-21 12:19:21,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:19:21,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-21 12:19:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:21,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326927345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:21,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:21,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:19:21,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621062813] [2021-08-21 12:19:21,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:21,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:21,626 INFO L87 Difference]: Start difference. First operand 187 states and 554 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:24,372 INFO L93 Difference]: Finished difference Result 333 states and 934 transitions. [2021-08-21 12:19:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:19:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:24,373 INFO L225 Difference]: With dead ends: 333 [2021-08-21 12:19:24,373 INFO L226 Difference]: Without dead ends: 325 [2021-08-21 12:19:24,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2727.3ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:19:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-21 12:19:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 187. [2021-08-21 12:19:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.978494623655914) internal successors, (554), 186 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 554 transitions. [2021-08-21 12:19:24,381 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 554 transitions. Word has length 17 [2021-08-21 12:19:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:24,381 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 554 transitions. [2021-08-21 12:19:24,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 554 transitions. [2021-08-21 12:19:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:24,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:24,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:24,409 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 12:19:24,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 12:19:24,582 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:24,582 INFO L82 PathProgramCache]: Analyzing trace with hash -813620231, now seen corresponding path program 60 times [2021-08-21 12:19:24,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:24,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466532779] [2021-08-21 12:19:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:24,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:24,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:24,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466532779] [2021-08-21 12:19:24,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466532779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:24,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805340856] [2021-08-21 12:19:24,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:24,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:24,937 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 12:19:24,938 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 12:19:28,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:19:28,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:28,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:19:28,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:29,117 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-08-21 12:19:29,643 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:29,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-21 12:19:29,650 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:29,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-21 12:19:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:29,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805340856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:29,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:29,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:19:29,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300293893] [2021-08-21 12:19:29,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:29,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:29,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:29,759 INFO L87 Difference]: Start difference. First operand 187 states and 554 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:30,281 INFO L93 Difference]: Finished difference Result 227 states and 655 transitions. [2021-08-21 12:19:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:30,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:30,282 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:19:30,282 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 12:19:30,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 542.0ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:19:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 12:19:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 185. [2021-08-21 12:19:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.983695652173913) internal successors, (549), 184 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 549 transitions. [2021-08-21 12:19:30,285 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 549 transitions. Word has length 17 [2021-08-21 12:19:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:30,285 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 549 transitions. [2021-08-21 12:19:30,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 549 transitions. [2021-08-21 12:19:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:30,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:30,285 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:30,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:30,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:19:30,486 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash 122442461, now seen corresponding path program 61 times [2021-08-21 12:19:30,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:30,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145084461] [2021-08-21 12:19:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:30,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:30,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:30,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145084461] [2021-08-21 12:19:30,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145084461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:30,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501862617] [2021-08-21 12:19:30,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:30,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:30,983 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 12:19:30,983 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 12:19:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:34,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:19:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:34,824 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 48 treesize of output 38 [2021-08-21 12:19:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:19:35,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-21 12:19:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:35,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501862617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:35,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:35,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 12:19:35,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954639711] [2021-08-21 12:19:35,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:35,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:35,607 INFO L87 Difference]: Start difference. First operand 185 states and 549 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:36,384 INFO L93 Difference]: Finished difference Result 248 states and 720 transitions. [2021-08-21 12:19:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:19:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:36,385 INFO L225 Difference]: With dead ends: 248 [2021-08-21 12:19:36,385 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 12:19:36,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 858.9ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:19:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 12:19:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 185. [2021-08-21 12:19:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.983695652173913) internal successors, (549), 184 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 549 transitions. [2021-08-21 12:19:36,388 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 549 transitions. Word has length 17 [2021-08-21 12:19:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:36,388 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 549 transitions. [2021-08-21 12:19:36,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 549 transitions. [2021-08-21 12:19:36,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:36,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:36,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:36,417 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 12:19:36,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:36,589 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1850254463, now seen corresponding path program 62 times [2021-08-21 12:19:36,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:36,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73516447] [2021-08-21 12:19:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:36,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:36,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:36,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73516447] [2021-08-21 12:19:36,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73516447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:36,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832571796] [2021-08-21 12:19:36,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:36,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:36,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:36,970 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 12:19:36,970 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 12:19:40,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:40,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:19:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:41,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:19:41,565 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:41,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-21 12:19:41,571 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-21 12:19:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:41,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832571796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:41,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:41,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:19:41,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993671396] [2021-08-21 12:19:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:19:41,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:19:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:19:41,722 INFO L87 Difference]: Start difference. First operand 185 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:42,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:42,410 INFO L93 Difference]: Finished difference Result 225 states and 644 transitions. [2021-08-21 12:19:42,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:42,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:42,411 INFO L225 Difference]: With dead ends: 225 [2021-08-21 12:19:42,411 INFO L226 Difference]: Without dead ends: 221 [2021-08-21 12:19:42,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:19:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-21 12:19:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 184. [2021-08-21 12:19:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.978142076502732) internal successors, (545), 183 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 545 transitions. [2021-08-21 12:19:42,414 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 545 transitions. Word has length 17 [2021-08-21 12:19:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:42,414 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 545 transitions. [2021-08-21 12:19:42,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 545 transitions. [2021-08-21 12:19:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:42,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:42,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:42,444 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 12:19:42,615 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,SelfDestructingSolverStorable114 [2021-08-21 12:19:42,615 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1510707201, now seen corresponding path program 63 times [2021-08-21 12:19:42,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:42,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876419137] [2021-08-21 12:19:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:42,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:42,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:42,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876419137] [2021-08-21 12:19:42,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876419137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:42,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289039543] [2021-08-21 12:19:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:42,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:42,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:42,936 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 12:19:42,937 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 12:19:46,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:19:46,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:46,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:19:46,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:19:47,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 121 [2021-08-21 12:19:47,271 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 121 treesize of output 97 [2021-08-21 12:19:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:47,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289039543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:47,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:47,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:19:47,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211884782] [2021-08-21 12:19:47,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:19:47,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:19:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:19:47,902 INFO L87 Difference]: Start difference. First operand 184 states and 545 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:48,951 INFO L93 Difference]: Finished difference Result 236 states and 675 transitions. [2021-08-21 12:19:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:19:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:48,952 INFO L225 Difference]: With dead ends: 236 [2021-08-21 12:19:48,952 INFO L226 Difference]: Without dead ends: 232 [2021-08-21 12:19:48,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1055.5ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:19:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-21 12:19:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 179. [2021-08-21 12:19:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-21 12:19:48,955 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-21 12:19:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:48,955 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-21 12:19:48,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-21 12:19:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:48,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:48,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:49,005 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 12:19:49,170 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,SelfDestructingSolverStorable115 [2021-08-21 12:19:49,171 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:49,171 INFO L82 PathProgramCache]: Analyzing trace with hash 671540775, now seen corresponding path program 64 times [2021-08-21 12:19:49,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:49,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080914489] [2021-08-21 12:19:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:49,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:49,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:49,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080914489] [2021-08-21 12:19:49,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080914489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:49,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264411000] [2021-08-21 12:19:49,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:49,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:49,431 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 12:19:49,431 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 12:19:53,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:53,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:19:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:53,381 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 51 treesize of output 41 [2021-08-21 12:19:53,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:19:53,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-21 12:19:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:54,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264411000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:54,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:54,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:19:54,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080655325] [2021-08-21 12:19:54,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:54,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:54,296 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:55,455 INFO L93 Difference]: Finished difference Result 252 states and 726 transitions. [2021-08-21 12:19:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:55,456 INFO L225 Difference]: With dead ends: 252 [2021-08-21 12:19:55,456 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:19:55,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1120.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:19:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:19:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2021-08-21 12:19:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-21 12:19:55,459 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-21 12:19:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:55,459 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-21 12:19:55,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-21 12:19:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:55,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:55,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:55,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 12:19:55,660 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,SelfDestructingSolverStorable116 [2021-08-21 12:19:55,660 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1632639089, now seen corresponding path program 65 times [2021-08-21 12:19:55,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:55,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453903706] [2021-08-21 12:19:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:55,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:55,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:55,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453903706] [2021-08-21 12:19:55,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453903706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:55,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951504347] [2021-08-21 12:19:55,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:55,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:55,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:55,928 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 12:19:55,929 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 12:19:59,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:59,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:59,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:00,137 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 63 treesize of output 51 [2021-08-21 12:20:00,384 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 109 treesize of output 89 [2021-08-21 12:20:00,386 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 89 treesize of output 69 [2021-08-21 12:20:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:00,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951504347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:00,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:00,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-21 12:20:00,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589430672] [2021-08-21 12:20:00,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:20:00,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:20:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:20:00,599 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:00,912 INFO L93 Difference]: Finished difference Result 219 states and 637 transitions. [2021-08-21 12:20:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:20:00,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:00,913 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:20:00,913 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:20:00,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:20:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 185. [2021-08-21 12:20:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-08-21 12:20:00,915 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-08-21 12:20:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:00,916 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-08-21 12:20:00,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-08-21 12:20:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:00,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:00,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:00,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 12:20:01,116 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,SelfDestructingSolverStorable117 [2021-08-21 12:20:01,117 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -927322703, now seen corresponding path program 66 times [2021-08-21 12:20:01,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:01,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590531578] [2021-08-21 12:20:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:01,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:01,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:01,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590531578] [2021-08-21 12:20:01,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590531578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:01,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409927991] [2021-08-21 12:20:01,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:01,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:01,392 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 12:20:01,392 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 12:20:05,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:20:05,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:05,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:20:05,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:05,771 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:05,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 47 [2021-08-21 12:20:05,958 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:05,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 121 [2021-08-21 12:20:05,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 88 [2021-08-21 12:20:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:06,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409927991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:06,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:06,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:20:06,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837885433] [2021-08-21 12:20:06,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:06,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:06,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:06,501 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:07,052 INFO L93 Difference]: Finished difference Result 216 states and 629 transitions. [2021-08-21 12:20:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:07,053 INFO L225 Difference]: With dead ends: 216 [2021-08-21 12:20:07,053 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 12:20:07,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:20:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 12:20:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2021-08-21 12:20:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-21 12:20:07,055 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-21 12:20:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:07,055 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-21 12:20:07,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-21 12:20:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:07,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:07,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:07,086 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 12:20:07,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:07,257 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1699418511, now seen corresponding path program 67 times [2021-08-21 12:20:07,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:07,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87619924] [2021-08-21 12:20:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:07,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:07,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:07,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87619924] [2021-08-21 12:20:07,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87619924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:07,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683090206] [2021-08-21 12:20:07,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:07,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:07,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:07,583 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 12:20:07,584 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 12:20:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:11,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:20:11,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:11,823 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 48 treesize of output 38 [2021-08-21 12:20:12,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:20:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-21 12:20:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:12,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683090206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:12,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:12,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:20:12,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686378602] [2021-08-21 12:20:12,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:12,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:12,542 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:13,268 INFO L93 Difference]: Finished difference Result 210 states and 610 transitions. [2021-08-21 12:20:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:20:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:13,269 INFO L225 Difference]: With dead ends: 210 [2021-08-21 12:20:13,269 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:20:13,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:20:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:20:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 183. [2021-08-21 12:20:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-21 12:20:13,272 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-21 12:20:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:13,272 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-21 12:20:13,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-21 12:20:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:13,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:13,272 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:13,301 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 12:20:13,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:13,473 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1960067455, now seen corresponding path program 68 times [2021-08-21 12:20:13,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:13,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995905491] [2021-08-21 12:20:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:13,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:13,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:13,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995905491] [2021-08-21 12:20:13,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995905491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:13,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286422317] [2021-08-21 12:20:13,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:13,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:13,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:13,760 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 12:20:13,761 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 12:20:17,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:20:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:18,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:20:18,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 161 [2021-08-21 12:20:18,370 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 161 treesize of output 127 [2021-08-21 12:20:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:18,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286422317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:18,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:18,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:20:18,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189828696] [2021-08-21 12:20:18,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:18,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:18,930 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:19,820 INFO L93 Difference]: Finished difference Result 234 states and 659 transitions. [2021-08-21 12:20:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:20:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:19,821 INFO L225 Difference]: With dead ends: 234 [2021-08-21 12:20:19,821 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 12:20:19,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:20:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 12:20:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 184. [2021-08-21 12:20:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9726775956284155) internal successors, (544), 183 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 544 transitions. [2021-08-21 12:20:19,824 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 544 transitions. Word has length 17 [2021-08-21 12:20:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:19,824 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 544 transitions. [2021-08-21 12:20:19,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 544 transitions. [2021-08-21 12:20:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:19,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:19,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:19,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:20,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:20,025 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash 964456183, now seen corresponding path program 69 times [2021-08-21 12:20:20,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:20,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991597329] [2021-08-21 12:20:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:20,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:20,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:20,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991597329] [2021-08-21 12:20:20,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991597329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:20,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316217012] [2021-08-21 12:20:20,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:20:20,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:20,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:20,431 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 12:20:20,431 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 12:20:24,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:20:24,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:20:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:24,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:20:24,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:20:25,440 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:25,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2021-08-21 12:20:25,447 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:25,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-21 12:20:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:25,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316217012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:25,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:25,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:20:25,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867999580] [2021-08-21 12:20:25,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:25,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:25,656 INFO L87 Difference]: Start difference. First operand 184 states and 544 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:26,570 INFO L93 Difference]: Finished difference Result 213 states and 605 transitions. [2021-08-21 12:20:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:26,571 INFO L225 Difference]: With dead ends: 213 [2021-08-21 12:20:26,571 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 12:20:26,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 916.3ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:20:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 12:20:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 183. [2021-08-21 12:20:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.967032967032967) internal successors, (540), 182 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 540 transitions. [2021-08-21 12:20:26,575 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 540 transitions. Word has length 17 [2021-08-21 12:20:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:26,575 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 540 transitions. [2021-08-21 12:20:26,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 540 transitions. [2021-08-21 12:20:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:26,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:26,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:26,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:26,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:26,801 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1898461815, now seen corresponding path program 70 times [2021-08-21 12:20:26,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:26,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437393586] [2021-08-21 12:20:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:26,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:27,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:27,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437393586] [2021-08-21 12:20:27,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437393586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:27,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814383798] [2021-08-21 12:20:27,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:20:27,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:27,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:27,243 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 12:20:27,270 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 12:20:31,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:20:31,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:20:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:31,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:20:31,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:20:31,920 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:31,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 110 [2021-08-21 12:20:31,929 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:31,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-21 12:20:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:32,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814383798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:32,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:32,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:20:32,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089146630] [2021-08-21 12:20:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:32,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:32,465 INFO L87 Difference]: Start difference. First operand 183 states and 540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:32,936 INFO L93 Difference]: Finished difference Result 220 states and 630 transitions. [2021-08-21 12:20:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:20:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:32,937 INFO L225 Difference]: With dead ends: 220 [2021-08-21 12:20:32,937 INFO L226 Difference]: Without dead ends: 216 [2021-08-21 12:20:32,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:20:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-21 12:20:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 180. [2021-08-21 12:20:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-21 12:20:32,941 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-21 12:20:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:32,941 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-21 12:20:32,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-21 12:20:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:32,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:32,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:32,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 12:20:33,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:33,165 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:33,165 INFO L82 PathProgramCache]: Analyzing trace with hash 330735769, now seen corresponding path program 71 times [2021-08-21 12:20:33,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:33,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658505835] [2021-08-21 12:20:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:33,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:33,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:33,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658505835] [2021-08-21 12:20:33,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658505835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:33,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693675665] [2021-08-21 12:20:33,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:20:33,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:33,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:33,608 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 12:20:33,609 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 12:20:37,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:20:37,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:20:37,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:38,064 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:38,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 94 [2021-08-21 12:20:40,413 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:40,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 115 [2021-08-21 12:20:40,421 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:40,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 93 [2021-08-21 12:20:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:40,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693675665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:40,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:40,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:20:40,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754168451] [2021-08-21 12:20:40,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:40,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:40,620 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:41,119 INFO L93 Difference]: Finished difference Result 205 states and 591 transitions. [2021-08-21 12:20:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:20:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:41,120 INFO L225 Difference]: With dead ends: 205 [2021-08-21 12:20:41,120 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 12:20:41,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:20:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 12:20:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2021-08-21 12:20:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9617486338797816) internal successors, (542), 183 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 542 transitions. [2021-08-21 12:20:41,123 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 542 transitions. Word has length 17 [2021-08-21 12:20:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:41,123 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 542 transitions. [2021-08-21 12:20:41,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 542 transitions. [2021-08-21 12:20:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:41,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:41,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:41,155 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 12:20:41,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 12:20:41,329 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1357906827, now seen corresponding path program 72 times [2021-08-21 12:20:41,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:41,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011348475] [2021-08-21 12:20:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:41,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:41,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:41,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011348475] [2021-08-21 12:20:41,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011348475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:41,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577494884] [2021-08-21 12:20:41,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:41,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:41,690 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 12:20:41,690 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 12:20:45,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:20:45,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:46,154 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:46,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2021-08-21 12:20:46,436 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:46,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 98 [2021-08-21 12:20:46,439 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 89 treesize of output 69 [2021-08-21 12:20:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:46,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577494884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:46,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:46,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:20:46,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030931193] [2021-08-21 12:20:46,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:46,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:46,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:46,791 INFO L87 Difference]: Start difference. First operand 184 states and 542 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:47,165 INFO L93 Difference]: Finished difference Result 216 states and 624 transitions. [2021-08-21 12:20:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:20:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:47,166 INFO L225 Difference]: With dead ends: 216 [2021-08-21 12:20:47,166 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 12:20:47,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 12:20:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 182. [2021-08-21 12:20:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-21 12:20:47,169 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-21 12:20:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:47,169 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-21 12:20:47,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-21 12:20:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:47,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:47,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:47,199 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 12:20:47,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 12:20:47,370 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1324307599, now seen corresponding path program 73 times [2021-08-21 12:20:47,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:47,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112314250] [2021-08-21 12:20:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:47,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:47,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:47,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112314250] [2021-08-21 12:20:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112314250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:47,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479011144] [2021-08-21 12:20:47,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:47,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:47,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:47,575 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 12:20:47,577 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 12:20:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:20:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:52,217 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:52,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2021-08-21 12:20:52,468 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:52,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 133 [2021-08-21 12:20:52,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 96 [2021-08-21 12:20:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:53,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479011144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:53,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:53,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:20:53,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250558617] [2021-08-21 12:20:53,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:53,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:53,184 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:53,416 INFO L93 Difference]: Finished difference Result 206 states and 599 transitions. [2021-08-21 12:20:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:20:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:53,417 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:20:53,417 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 12:20:53,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 12:20:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 180. [2021-08-21 12:20:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-21 12:20:53,419 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-21 12:20:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:53,419 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-21 12:20:53,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-21 12:20:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:53,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:53,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:53,449 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 12:20:53,625 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,SelfDestructingSolverStorable125 [2021-08-21 12:20:53,625 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1959263665, now seen corresponding path program 74 times [2021-08-21 12:20:53,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:53,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808442310] [2021-08-21 12:20:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:53,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:53,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:53,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808442310] [2021-08-21 12:20:53,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808442310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:53,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062927099] [2021-08-21 12:20:53,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:53,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:53,968 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 12:20:53,969 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 12:20:58,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:58,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:20:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:58,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:20:59,128 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 218 treesize of output 180 [2021-08-21 12:20:59,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-21 12:21:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:00,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062927099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:00,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:00,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:21:00,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851343952] [2021-08-21 12:21:00,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:00,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:00,016 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:00,799 INFO L93 Difference]: Finished difference Result 216 states and 619 transitions. [2021-08-21 12:21:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:00,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:00,800 INFO L225 Difference]: With dead ends: 216 [2021-08-21 12:21:00,800 INFO L226 Difference]: Without dead ends: 208 [2021-08-21 12:21:00,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 958.2ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:21:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-21 12:21:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 182. [2021-08-21 12:21:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-21 12:21:00,803 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-21 12:21:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:00,803 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-21 12:21:00,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-21 12:21:00,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:00,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:00,815 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:00,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 12:21:01,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:01,041 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1616680153, now seen corresponding path program 75 times [2021-08-21 12:21:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:01,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987559118] [2021-08-21 12:21:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:01,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:01,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:01,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987559118] [2021-08-21 12:21:01,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987559118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:01,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616095033] [2021-08-21 12:21:01,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:01,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:01,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:01,329 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 12:21:01,355 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 12:21:05,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:21:05,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:21:05,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:06,002 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:06,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2021-08-21 12:21:06,163 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:06,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 106 [2021-08-21 12:21:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:21:06,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2021-08-21 12:21:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:06,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616095033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:06,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:06,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:21:06,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798630817] [2021-08-21 12:21:06,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:21:06,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:21:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:21:06,678 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:07,347 INFO L93 Difference]: Finished difference Result 206 states and 599 transitions. [2021-08-21 12:21:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:21:07,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:07,348 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:21:07,348 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 12:21:07,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 638.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 12:21:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 177. [2021-08-21 12:21:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-21 12:21:07,351 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-21 12:21:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:07,352 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-21 12:21:07,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-21 12:21:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:07,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:07,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:07,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 12:21:07,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:07,557 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:07,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1018402129, now seen corresponding path program 76 times [2021-08-21 12:21:07,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:07,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21713838] [2021-08-21 12:21:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:07,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:07,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:07,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21713838] [2021-08-21 12:21:07,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21713838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:07,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178854777] [2021-08-21 12:21:07,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:07,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:07,888 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 12:21:07,889 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 12:21:12,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:12,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:21:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:12,481 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 51 treesize of output 41 [2021-08-21 12:21:12,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:21:12,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-21 12:21:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:13,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178854777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:13,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:13,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:21:13,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707949263] [2021-08-21 12:21:13,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:13,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:13,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:13,425 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:14,303 INFO L93 Difference]: Finished difference Result 297 states and 851 transitions. [2021-08-21 12:21:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:21:14,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:14,304 INFO L225 Difference]: With dead ends: 297 [2021-08-21 12:21:14,304 INFO L226 Difference]: Without dead ends: 293 [2021-08-21 12:21:14,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:21:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-21 12:21:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 185. [2021-08-21 12:21:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-08-21 12:21:14,307 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-08-21 12:21:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:14,307 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-08-21 12:21:14,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-08-21 12:21:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:14,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:14,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:14,338 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 12:21:14,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:14,508 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash -57303815, now seen corresponding path program 77 times [2021-08-21 12:21:14,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:14,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402372168] [2021-08-21 12:21:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:14,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:14,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:14,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402372168] [2021-08-21 12:21:14,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402372168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:14,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172180614] [2021-08-21 12:21:14,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:14,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:14,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:14,875 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 12:21:14,876 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 12:21:19,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:19,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:21:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:19,763 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:19,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 82 [2021-08-21 12:21:20,788 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:20,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 97 [2021-08-21 12:21:20,791 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 88 treesize of output 70 [2021-08-21 12:21:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:20,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172180614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:20,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:20,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:21:20,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547650588] [2021-08-21 12:21:20,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:21:20,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:21:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:20,941 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:21,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:21,745 INFO L93 Difference]: Finished difference Result 260 states and 746 transitions. [2021-08-21 12:21:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:21:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:21,746 INFO L225 Difference]: With dead ends: 260 [2021-08-21 12:21:21,746 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 12:21:21,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:21:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 12:21:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 189. [2021-08-21 12:21:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9627659574468086) internal successors, (557), 188 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 557 transitions. [2021-08-21 12:21:21,749 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 557 transitions. Word has length 17 [2021-08-21 12:21:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:21,749 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 557 transitions. [2021-08-21 12:21:21,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 557 transitions. [2021-08-21 12:21:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:21,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:21,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:21,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:21,950 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,SelfDestructingSolverStorable129 [2021-08-21 12:21:21,950 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2045810801, now seen corresponding path program 78 times [2021-08-21 12:21:21,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:21,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263220864] [2021-08-21 12:21:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:21,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:22,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:22,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263220864] [2021-08-21 12:21:22,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263220864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:22,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354743291] [2021-08-21 12:21:22,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:21:22,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:22,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:22,221 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 12:21:22,222 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 12:21:26,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:21:26,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:26,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:21:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:27,186 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:27,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:21:27,746 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:27,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 189 [2021-08-21 12:21:27,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 148 [2021-08-21 12:21:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:28,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354743291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:28,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:28,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:21:28,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631743488] [2021-08-21 12:21:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:28,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:28,383 INFO L87 Difference]: Start difference. First operand 189 states and 557 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:29,319 INFO L93 Difference]: Finished difference Result 271 states and 779 transitions. [2021-08-21 12:21:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:21:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:29,320 INFO L225 Difference]: With dead ends: 271 [2021-08-21 12:21:29,320 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 12:21:29,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 837.9ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:21:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 12:21:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 187. [2021-08-21 12:21:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9516129032258065) internal successors, (549), 186 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 549 transitions. [2021-08-21 12:21:29,346 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 549 transitions. Word has length 17 [2021-08-21 12:21:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:29,346 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 549 transitions. [2021-08-21 12:21:29,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 549 transitions. [2021-08-21 12:21:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:29,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:29,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:29,393 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 12:21:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:29,573 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1677701689, now seen corresponding path program 79 times [2021-08-21 12:21:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:29,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971095886] [2021-08-21 12:21:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:29,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:29,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:29,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971095886] [2021-08-21 12:21:29,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971095886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:29,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55319019] [2021-08-21 12:21:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:21:29,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:29,863 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 12:21:29,911 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 12:21:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:21:34,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:34,865 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:34,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-08-21 12:21:35,128 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:35,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 135 [2021-08-21 12:21:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-21 12:21:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:35,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55319019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:35,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:35,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:21:35,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922125809] [2021-08-21 12:21:35,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:21:35,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:35,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:21:35,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:35,973 INFO L87 Difference]: Start difference. First operand 187 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:36,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:36,676 INFO L93 Difference]: Finished difference Result 261 states and 754 transitions. [2021-08-21 12:21:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:21:36,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:36,697 INFO L225 Difference]: With dead ends: 261 [2021-08-21 12:21:36,697 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 12:21:36,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 706.4ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:21:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 12:21:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 181. [2021-08-21 12:21:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-08-21 12:21:36,701 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-08-21 12:21:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:36,701 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-08-21 12:21:36,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-08-21 12:21:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:36,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:36,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:36,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:36,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:36,917 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash -29760549, now seen corresponding path program 80 times [2021-08-21 12:21:36,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:36,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691532784] [2021-08-21 12:21:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:36,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:37,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:37,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691532784] [2021-08-21 12:21:37,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691532784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:37,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18168833] [2021-08-21 12:21:37,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:21:37,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:37,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:37,293 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 12:21:37,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:21:41,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:21:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:42,242 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:42,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:21:42,938 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:42,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2021-08-21 12:21:42,940 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 44 treesize of output 32 [2021-08-21 12:21:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:43,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18168833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:43,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:43,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:21:43,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096006640] [2021-08-21 12:21:43,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:21:43,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:21:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:43,050 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:43,707 INFO L93 Difference]: Finished difference Result 268 states and 768 transitions. [2021-08-21 12:21:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:21:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:43,708 INFO L225 Difference]: With dead ends: 268 [2021-08-21 12:21:43,708 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 12:21:43,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:21:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 12:21:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 187. [2021-08-21 12:21:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-08-21 12:21:43,710 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-08-21 12:21:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:43,711 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-08-21 12:21:43,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-08-21 12:21:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:43,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:43,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:43,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 12:21:43,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:43,917 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:43,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2018267535, now seen corresponding path program 81 times [2021-08-21 12:21:43,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:43,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770835688] [2021-08-21 12:21:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:43,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:44,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:44,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770835688] [2021-08-21 12:21:44,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770835688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:44,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960402911] [2021-08-21 12:21:44,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:44,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:44,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:44,169 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:44,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:21:48,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:21:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:21:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:49,149 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:49,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-21 12:21:49,727 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:49,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 189 [2021-08-21 12:21:49,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 148 [2021-08-21 12:21:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:50,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960402911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:50,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:50,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:21:50,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461622686] [2021-08-21 12:21:50,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:50,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:50,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:50,438 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:51,339 INFO L93 Difference]: Finished difference Result 279 states and 801 transitions. [2021-08-21 12:21:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:21:51,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:51,340 INFO L225 Difference]: With dead ends: 279 [2021-08-21 12:21:51,340 INFO L226 Difference]: Without dead ends: 275 [2021-08-21 12:21:51,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 824.1ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:21:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-21 12:21:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 185. [2021-08-21 12:21:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-08-21 12:21:51,343 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-08-21 12:21:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:51,343 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-08-21 12:21:51,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-08-21 12:21:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:51,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:51,343 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:51,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:51,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 12:21:51,544 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:51,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1705244955, now seen corresponding path program 82 times [2021-08-21 12:21:51,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:51,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612785239] [2021-08-21 12:21:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:51,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:51,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:51,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612785239] [2021-08-21 12:21:51,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612785239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:51,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124266161] [2021-08-21 12:21:51,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:51,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:51,817 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:51,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:21:56,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:56,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:21:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:56,959 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-08-21 12:21:57,208 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 135 [2021-08-21 12:21:57,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-21 12:21:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:57,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124266161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:57,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:57,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:21:57,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836039036] [2021-08-21 12:21:57,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:21:57,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:21:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:57,981 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:58,629 INFO L93 Difference]: Finished difference Result 269 states and 776 transitions. [2021-08-21 12:21:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:21:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:58,629 INFO L225 Difference]: With dead ends: 269 [2021-08-21 12:21:58,630 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 12:21:58,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:21:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 12:21:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2021-08-21 12:21:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-21 12:21:58,632 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-21 12:21:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:58,632 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-21 12:21:58,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-21 12:21:58,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:58,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:58,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:58,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 12:21:58,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:21:58,833 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash 96929773, now seen corresponding path program 83 times [2021-08-21 12:21:58,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:58,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349126942] [2021-08-21 12:21:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:58,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:59,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:59,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349126942] [2021-08-21 12:21:59,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349126942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:59,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952389609] [2021-08-21 12:21:59,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:59,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:59,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:59,078 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:59,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:22:03,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:22:03,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:03,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:22:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:04,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:22:04,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-21 12:22:04,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2021-08-21 12:22:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:05,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952389609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:05,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:05,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:22:05,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466914064] [2021-08-21 12:22:05,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:05,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:05,118 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:05,857 INFO L93 Difference]: Finished difference Result 303 states and 869 transitions. [2021-08-21 12:22:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:22:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:05,858 INFO L225 Difference]: With dead ends: 303 [2021-08-21 12:22:05,858 INFO L226 Difference]: Without dead ends: 299 [2021-08-21 12:22:05,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 780.9ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:22:05,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-21 12:22:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 187. [2021-08-21 12:22:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9516129032258065) internal successors, (549), 186 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 549 transitions. [2021-08-21 12:22:05,861 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 549 transitions. Word has length 17 [2021-08-21 12:22:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:05,861 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 549 transitions. [2021-08-21 12:22:05,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:05,861 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 549 transitions. [2021-08-21 12:22:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:05,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:05,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:05,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:06,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:22:06,062 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:06,062 INFO L82 PathProgramCache]: Analyzing trace with hash 60634429, now seen corresponding path program 84 times [2021-08-21 12:22:06,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:06,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769235636] [2021-08-21 12:22:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:06,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:06,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:06,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769235636] [2021-08-21 12:22:06,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769235636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:06,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346846720] [2021-08-21 12:22:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:06,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:06,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:06,355 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:06,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:22:11,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:22:11,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:11,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:22:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:11,823 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2021-08-21 12:22:12,129 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:12,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2021-08-21 12:22:12,136 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 44 treesize of output 32 [2021-08-21 12:22:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:12,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346846720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:12,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:12,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:22:12,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890735133] [2021-08-21 12:22:12,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:12,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:12,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:12,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:12,245 INFO L87 Difference]: Start difference. First operand 187 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:12,801 INFO L93 Difference]: Finished difference Result 228 states and 661 transitions. [2021-08-21 12:22:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:22:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:12,802 INFO L225 Difference]: With dead ends: 228 [2021-08-21 12:22:12,802 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:22:12,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 572.4ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:22:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:22:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 192. [2021-08-21 12:22:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-08-21 12:22:12,804 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-08-21 12:22:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:12,804 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-08-21 12:22:12,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-08-21 12:22:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:12,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:12,805 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:12,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 12:22:13,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:22:13,006 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash -200014515, now seen corresponding path program 85 times [2021-08-21 12:22:13,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:13,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881804524] [2021-08-21 12:22:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:13,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:13,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:13,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881804524] [2021-08-21 12:22:13,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881804524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:13,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470243032] [2021-08-21 12:22:13,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:13,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:13,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:13,255 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:13,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:22:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:22:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:18,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:22:18,770 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 218 treesize of output 180 [2021-08-21 12:22:18,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-21 12:22:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:19,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470243032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:19,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:19,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:22:19,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567613538] [2021-08-21 12:22:19,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:19,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:19,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:19,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:19,631 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:20,572 INFO L93 Difference]: Finished difference Result 247 states and 698 transitions. [2021-08-21 12:22:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:22:20,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:20,573 INFO L225 Difference]: With dead ends: 247 [2021-08-21 12:22:20,573 INFO L226 Difference]: Without dead ends: 239 [2021-08-21 12:22:20,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 997.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:22:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-21 12:22:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 193. [2021-08-21 12:22:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9739583333333335) internal successors, (571), 192 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 571 transitions. [2021-08-21 12:22:20,575 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 571 transitions. Word has length 17 [2021-08-21 12:22:20,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:20,575 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 571 transitions. [2021-08-21 12:22:20,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 571 transitions. [2021-08-21 12:22:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:20,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:20,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:20,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:20,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-21 12:22:20,776 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1570458173, now seen corresponding path program 86 times [2021-08-21 12:22:20,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:20,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397372968] [2021-08-21 12:22:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:20,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:21,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:21,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397372968] [2021-08-21 12:22:21,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397372968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:21,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441699980] [2021-08-21 12:22:21,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:22:21,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:21,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:21,140 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:21,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:22:26,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:26,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:22:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:26,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:22:26,755 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-21 12:22:26,761 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-21 12:22:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:26,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441699980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:26,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:26,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:22:26,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540797610] [2021-08-21 12:22:26,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:26,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:26,990 INFO L87 Difference]: Start difference. First operand 193 states and 571 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:27,824 INFO L93 Difference]: Finished difference Result 226 states and 644 transitions. [2021-08-21 12:22:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:22:27,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:27,825 INFO L225 Difference]: With dead ends: 226 [2021-08-21 12:22:27,825 INFO L226 Difference]: Without dead ends: 222 [2021-08-21 12:22:27,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-21 12:22:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 192. [2021-08-21 12:22:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.968586387434555) internal successors, (567), 191 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 567 transitions. [2021-08-21 12:22:27,828 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 567 transitions. Word has length 17 [2021-08-21 12:22:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:27,829 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 567 transitions. [2021-08-21 12:22:27,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 567 transitions. [2021-08-21 12:22:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:27,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:27,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:27,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:28,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:28,049 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash -636452541, now seen corresponding path program 87 times [2021-08-21 12:22:28,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:28,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589643589] [2021-08-21 12:22:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:28,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:28,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:28,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589643589] [2021-08-21 12:22:28,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589643589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:28,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542231080] [2021-08-21 12:22:28,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:22:28,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:28,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:28,413 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:28,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:22:33,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:22:33,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:22:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:33,685 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 74 [2021-08-21 12:22:34,107 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 116 [2021-08-21 12:22:34,115 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:34,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-21 12:22:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:34,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542231080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:34,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:34,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:22:34,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931542732] [2021-08-21 12:22:34,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:22:34,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:22:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:22:34,698 INFO L87 Difference]: Start difference. First operand 192 states and 567 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:35,114 INFO L93 Difference]: Finished difference Result 233 states and 669 transitions. [2021-08-21 12:22:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:22:35,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:35,115 INFO L225 Difference]: With dead ends: 233 [2021-08-21 12:22:35,115 INFO L226 Difference]: Without dead ends: 229 [2021-08-21 12:22:35,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-21 12:22:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 189. [2021-08-21 12:22:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-08-21 12:22:35,117 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 17 [2021-08-21 12:22:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:35,118 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-08-21 12:22:35,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-08-21 12:22:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:35,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:35,118 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:35,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 12:22:35,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 12:22:35,319 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:35,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2090788709, now seen corresponding path program 88 times [2021-08-21 12:22:35,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:35,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842453443] [2021-08-21 12:22:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:35,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:35,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:35,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842453443] [2021-08-21 12:22:35,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842453443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:35,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60060308] [2021-08-21 12:22:35,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:22:35,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:35,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:35,711 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:35,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:22:40,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:22:40,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:22:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:40,933 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 51 treesize of output 41 [2021-08-21 12:22:41,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:22:41,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-21 12:22:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:41,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60060308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:41,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:41,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:22:41,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241026066] [2021-08-21 12:22:41,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:41,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:41,822 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:42,592 INFO L93 Difference]: Finished difference Result 227 states and 663 transitions. [2021-08-21 12:22:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:22:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:42,593 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:22:42,593 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 12:22:42,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 812.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:22:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 12:22:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2021-08-21 12:22:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9526315789473685) internal successors, (561), 190 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 561 transitions. [2021-08-21 12:22:42,595 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 561 transitions. Word has length 17 [2021-08-21 12:22:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:42,595 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 561 transitions. [2021-08-21 12:22:42,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 561 transitions. [2021-08-21 12:22:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:42,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:42,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:42,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 12:22:42,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:42,801 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1210606757, now seen corresponding path program 89 times [2021-08-21 12:22:42,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:42,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206702328] [2021-08-21 12:22:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:42,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:43,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:43,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206702328] [2021-08-21 12:22:43,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206702328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:43,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442380800] [2021-08-21 12:22:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:22:43,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:43,104 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:43,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:22:48,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:22:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:22:48,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:48,443 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:48,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-21 12:22:48,625 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:48,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 129 [2021-08-21 12:22:48,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 102 [2021-08-21 12:22:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442380800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:49,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:49,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:22:49,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069887120] [2021-08-21 12:22:49,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:22:49,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:49,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:22:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:22:49,204 INFO L87 Difference]: Start difference. First operand 191 states and 561 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:49,726 INFO L93 Difference]: Finished difference Result 219 states and 638 transitions. [2021-08-21 12:22:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:22:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:49,727 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:22:49,727 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:22:49,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:22:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 189. [2021-08-21 12:22:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-08-21 12:22:49,730 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 17 [2021-08-21 12:22:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:49,730 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-08-21 12:22:49,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-08-21 12:22:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:49,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:49,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:49,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 12:22:49,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:49,953 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash -199210725, now seen corresponding path program 90 times [2021-08-21 12:22:49,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:49,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552037744] [2021-08-21 12:22:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:49,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:50,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:50,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552037744] [2021-08-21 12:22:50,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552037744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:50,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299611570] [2021-08-21 12:22:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:50,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:50,296 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:50,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:22:55,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:22:55,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:55,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:55,787 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 64 treesize of output 52 [2021-08-21 12:22:56,002 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:56,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2021-08-21 12:22:56,008 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:56,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 85 [2021-08-21 12:22:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:56,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299611570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:56,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:56,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:22:56,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345702265] [2021-08-21 12:22:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:22:56,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:22:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:22:56,369 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:56,763 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2021-08-21 12:22:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:22:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:56,764 INFO L225 Difference]: With dead ends: 221 [2021-08-21 12:22:56,764 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:22:56,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:22:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 191. [2021-08-21 12:22:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9526315789473685) internal successors, (561), 190 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 561 transitions. [2021-08-21 12:22:56,768 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 561 transitions. Word has length 17 [2021-08-21 12:22:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:56,768 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 561 transitions. [2021-08-21 12:22:56,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 561 transitions. [2021-08-21 12:22:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:56,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:56,768 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:56,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:56,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:56,993 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:56,994 INFO L82 PathProgramCache]: Analyzing trace with hash 143372787, now seen corresponding path program 91 times [2021-08-21 12:22:56,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:56,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608499869] [2021-08-21 12:22:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:56,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:57,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:57,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608499869] [2021-08-21 12:22:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608499869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:57,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683685630] [2021-08-21 12:22:57,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:57,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:57,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:57,364 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:57,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:23:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:23:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:02,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:23:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-21 12:23:02,936 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 97 treesize of output 77 [2021-08-21 12:23:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:03,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683685630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:03,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:03,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:23:03,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637483476] [2021-08-21 12:23:03,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:23:03,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:23:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:23:03,881 INFO L87 Difference]: Start difference. First operand 191 states and 561 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:04,594 INFO L93 Difference]: Finished difference Result 227 states and 652 transitions. [2021-08-21 12:23:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:23:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:04,594 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:23:04,594 INFO L226 Difference]: Without dead ends: 219 [2021-08-21 12:23:04,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:23:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-21 12:23:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 188. [2021-08-21 12:23:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9518716577540105) internal successors, (552), 187 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 552 transitions. [2021-08-21 12:23:04,597 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 552 transitions. Word has length 17 [2021-08-21 12:23:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:04,597 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 552 transitions. [2021-08-21 12:23:04,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 552 transitions. [2021-08-21 12:23:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:04,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:04,598 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:04,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:04,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:04,798 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1204990429, now seen corresponding path program 92 times [2021-08-21 12:23:04,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:04,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340420937] [2021-08-21 12:23:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:04,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:05,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:05,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340420937] [2021-08-21 12:23:05,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340420937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:05,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668858717] [2021-08-21 12:23:05,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:05,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:05,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:05,112 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:05,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:23:10,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:10,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:10,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:23:10,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:10,620 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:10,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 88 [2021-08-21 12:23:11,490 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:11,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2021-08-21 12:23:11,496 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:11,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-21 12:23:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:11,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668858717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:11,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:11,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:23:11,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685639125] [2021-08-21 12:23:11,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:11,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:11,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:11,606 INFO L87 Difference]: Start difference. First operand 188 states and 552 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:12,131 INFO L93 Difference]: Finished difference Result 235 states and 679 transitions. [2021-08-21 12:23:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:23:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:12,132 INFO L225 Difference]: With dead ends: 235 [2021-08-21 12:23:12,132 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:23:12,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 410.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:23:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:23:12,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 194. [2021-08-21 12:23:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9637305699481864) internal successors, (572), 193 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 572 transitions. [2021-08-21 12:23:12,135 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 572 transitions. Word has length 17 [2021-08-21 12:23:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:12,135 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 572 transitions. [2021-08-21 12:23:12,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 572 transitions. [2021-08-21 12:23:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:12,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:12,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:12,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 12:23:12,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 12:23:12,349 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2062805809, now seen corresponding path program 93 times [2021-08-21 12:23:12,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:12,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952664774] [2021-08-21 12:23:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:12,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:12,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:12,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952664774] [2021-08-21 12:23:12,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952664774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:12,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278910892] [2021-08-21 12:23:12,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:23:12,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:12,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:12,774 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:12,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:23:18,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:23:18,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:23:18,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:18,348 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:18,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 86 [2021-08-21 12:23:19,048 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:19,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 130 [2021-08-21 12:23:19,057 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:19,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2021-08-21 12:23:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278910892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:19,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:19,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:23:19,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436843798] [2021-08-21 12:23:19,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:19,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:19,567 INFO L87 Difference]: Start difference. First operand 194 states and 572 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:20,064 INFO L93 Difference]: Finished difference Result 246 states and 712 transitions. [2021-08-21 12:23:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:23:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:20,065 INFO L225 Difference]: With dead ends: 246 [2021-08-21 12:23:20,065 INFO L226 Difference]: Without dead ends: 242 [2021-08-21 12:23:20,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:23:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-21 12:23:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 192. [2021-08-21 12:23:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-08-21 12:23:20,068 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-08-21 12:23:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:20,068 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-08-21 12:23:20,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-08-21 12:23:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:20,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:20,068 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:20,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:20,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 12:23:20,269 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:20,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2096405037, now seen corresponding path program 94 times [2021-08-21 12:23:20,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:20,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106680447] [2021-08-21 12:23:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:20,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:20,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:20,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106680447] [2021-08-21 12:23:20,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106680447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:20,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511236781] [2021-08-21 12:23:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:23:20,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:20,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:20,591 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:20,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:23:26,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:23:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:26,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:23:26,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:26,384 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-08-21 12:23:27,146 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 146 [2021-08-21 12:23:27,154 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:27,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2021-08-21 12:23:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:27,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511236781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:27,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:27,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:23:27,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358159144] [2021-08-21 12:23:27,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:23:27,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:23:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:23:27,906 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:28,371 INFO L93 Difference]: Finished difference Result 237 states and 690 transitions. [2021-08-21 12:23:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:23:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:28,372 INFO L225 Difference]: With dead ends: 237 [2021-08-21 12:23:28,372 INFO L226 Difference]: Without dead ends: 233 [2021-08-21 12:23:28,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:23:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-21 12:23:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 190. [2021-08-21 12:23:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-08-21 12:23:28,375 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-08-21 12:23:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:28,375 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-08-21 12:23:28,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-08-21 12:23:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:28,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:28,375 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:28,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:28,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 12:23:28,576 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1177992399, now seen corresponding path program 95 times [2021-08-21 12:23:28,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:28,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920378589] [2021-08-21 12:23:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:28,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:28,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:28,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920378589] [2021-08-21 12:23:28,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920378589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:28,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349002174] [2021-08-21 12:23:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:23:28,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:28,944 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:28,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:23:34,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:23:34,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:23:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:23:34,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 98 [2021-08-21 12:23:34,808 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 98 treesize of output 78 [2021-08-21 12:23:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:35,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349002174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:35,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:35,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:23:35,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382270465] [2021-08-21 12:23:35,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:35,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:35,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:35,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:35,669 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:37,428 INFO L93 Difference]: Finished difference Result 279 states and 797 transitions. [2021-08-21 12:23:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:23:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:37,429 INFO L225 Difference]: With dead ends: 279 [2021-08-21 12:23:37,429 INFO L226 Difference]: Without dead ends: 271 [2021-08-21 12:23:37,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1715.1ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:23:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-21 12:23:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 188. [2021-08-21 12:23:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9518716577540105) internal successors, (552), 187 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 552 transitions. [2021-08-21 12:23:37,432 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 552 transitions. Word has length 17 [2021-08-21 12:23:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:37,432 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 552 transitions. [2021-08-21 12:23:37,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 552 transitions. [2021-08-21 12:23:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:37,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:37,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:37,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 12:23:37,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 12:23:37,633 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 398125933, now seen corresponding path program 96 times [2021-08-21 12:23:37,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:37,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169851715] [2021-08-21 12:23:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:37,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:37,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:37,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169851715] [2021-08-21 12:23:37,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169851715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:37,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311073254] [2021-08-21 12:23:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:23:37,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:37,913 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:37,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:23:43,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:23:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:23:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:43,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-21 12:23:43,968 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:43,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 110 [2021-08-21 12:23:43,975 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:43,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-21 12:23:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:44,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311073254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:44,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:44,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:23:44,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421089138] [2021-08-21 12:23:44,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:44,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:44,227 INFO L87 Difference]: Start difference. First operand 188 states and 552 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:44,900 INFO L93 Difference]: Finished difference Result 237 states and 692 transitions. [2021-08-21 12:23:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:23:44,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:44,900 INFO L225 Difference]: With dead ends: 237 [2021-08-21 12:23:44,901 INFO L226 Difference]: Without dead ends: 233 [2021-08-21 12:23:44,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-21 12:23:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 192. [2021-08-21 12:23:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-08-21 12:23:44,903 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-08-21 12:23:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:44,903 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-08-21 12:23:44,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:44,903 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-08-21 12:23:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:44,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:44,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:44,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:45,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:45,105 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 740709445, now seen corresponding path program 97 times [2021-08-21 12:23:45,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:45,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786876037] [2021-08-21 12:23:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:45,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:45,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:45,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786876037] [2021-08-21 12:23:45,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786876037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:45,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224073193] [2021-08-21 12:23:45,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:23:45,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:45,349 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:45,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:23:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:23:50,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:23:51,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-21 12:23:51,280 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 97 treesize of output 77 [2021-08-21 12:23:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:52,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224073193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:52,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:52,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:23:52,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812871946] [2021-08-21 12:23:52,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:23:52,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:23:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:23:52,181 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:53,120 INFO L93 Difference]: Finished difference Result 243 states and 700 transitions. [2021-08-21 12:23:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:23:53,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:53,120 INFO L225 Difference]: With dead ends: 243 [2021-08-21 12:23:53,120 INFO L226 Difference]: Without dead ends: 235 [2021-08-21 12:23:53,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 927.4ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:23:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-21 12:23:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 190. [2021-08-21 12:23:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-08-21 12:23:53,123 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-08-21 12:23:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:53,123 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-08-21 12:23:53,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-08-21 12:23:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:53,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:53,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:53,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-21 12:23:53,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 12:23:53,324 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1366074675, now seen corresponding path program 98 times [2021-08-21 12:23:53,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:53,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430117553] [2021-08-21 12:23:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:53,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:53,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:53,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430117553] [2021-08-21 12:23:53,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430117553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:53,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803160165] [2021-08-21 12:23:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:53,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:53,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:53,552 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:53,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:23:59,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:59,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:23:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:59,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:23:59,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 98 [2021-08-21 12:23:59,560 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 98 treesize of output 78 [2021-08-21 12:24:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803160165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:00,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:24:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772704548] [2021-08-21 12:24:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:00,519 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:01,573 INFO L93 Difference]: Finished difference Result 277 states and 793 transitions. [2021-08-21 12:24:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:24:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:01,574 INFO L225 Difference]: With dead ends: 277 [2021-08-21 12:24:01,574 INFO L226 Difference]: Without dead ends: 269 [2021-08-21 12:24:01,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1051.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:24:01,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-21 12:24:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 190. [2021-08-21 12:24:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-08-21 12:24:01,576 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-08-21 12:24:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:01,576 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-08-21 12:24:01,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-08-21 12:24:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:01,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:01,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:01,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 12:24:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:01,777 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash -177078601, now seen corresponding path program 99 times [2021-08-21 12:24:01,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:01,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918392806] [2021-08-21 12:24:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:01,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:02,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:02,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918392806] [2021-08-21 12:24:02,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918392806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:02,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815840644] [2021-08-21 12:24:02,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:24:02,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:02,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:02,035 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:02,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:24:07,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:24:07,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:07,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:24:07,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:08,293 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:08,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-08-21 12:24:08,598 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:08,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-21 12:24:08,605 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:08,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2021-08-21 12:24:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:08,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815840644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:08,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:08,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:24:08,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45654014] [2021-08-21 12:24:08,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:08,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:08,710 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:09,245 INFO L93 Difference]: Finished difference Result 239 states and 687 transitions. [2021-08-21 12:24:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:09,246 INFO L225 Difference]: With dead ends: 239 [2021-08-21 12:24:09,246 INFO L226 Difference]: Without dead ends: 235 [2021-08-21 12:24:09,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 510.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:24:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-21 12:24:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 195. [2021-08-21 12:24:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.948453608247423) internal successors, (572), 194 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 572 transitions. [2021-08-21 12:24:09,249 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 572 transitions. Word has length 17 [2021-08-21 12:24:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 572 transitions. [2021-08-21 12:24:09,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 572 transitions. [2021-08-21 12:24:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:09,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:09,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:09,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:09,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:09,450 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash -437727545, now seen corresponding path program 100 times [2021-08-21 12:24:09,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:09,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822630838] [2021-08-21 12:24:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:09,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:09,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:09,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822630838] [2021-08-21 12:24:09,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822630838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:09,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541429587] [2021-08-21 12:24:09,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:24:09,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:09,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:09,721 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:09,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:24:15,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:24:15,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:15,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:24:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:15,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:24:15,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 162 [2021-08-21 12:24:15,976 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 162 treesize of output 128 [2021-08-21 12:24:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:16,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541429587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:16,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:16,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:24:16,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766878369] [2021-08-21 12:24:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:24:16,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:24:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:24:16,631 INFO L87 Difference]: Start difference. First operand 195 states and 572 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:17,619 INFO L93 Difference]: Finished difference Result 273 states and 772 transitions. [2021-08-21 12:24:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:24:17,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:17,620 INFO L225 Difference]: With dead ends: 273 [2021-08-21 12:24:17,620 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 12:24:17,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 903.7ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:24:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 12:24:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 199. [2021-08-21 12:24:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9696969696969697) internal successors, (588), 198 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 588 transitions. [2021-08-21 12:24:17,622 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 588 transitions. Word has length 17 [2021-08-21 12:24:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:17,623 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 588 transitions. [2021-08-21 12:24:17,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 588 transitions. [2021-08-21 12:24:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:17,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:17,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:17,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:17,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:17,823 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1753884849, now seen corresponding path program 101 times [2021-08-21 12:24:17,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:17,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113980212] [2021-08-21 12:24:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:17,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:18,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:18,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113980212] [2021-08-21 12:24:18,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113980212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:18,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482304192] [2021-08-21 12:24:18,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:24:18,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:18,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:18,019 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:18,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:24:23,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:24:23,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:24:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:24,233 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:24,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-21 12:24:25,144 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:25,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 114 [2021-08-21 12:24:25,151 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:25,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 88 [2021-08-21 12:24:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:25,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482304192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:25,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:25,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:24:25,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647070659] [2021-08-21 12:24:25,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:24:25,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:24:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:24:25,496 INFO L87 Difference]: Start difference. First operand 199 states and 588 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:26,052 INFO L93 Difference]: Finished difference Result 274 states and 779 transitions. [2021-08-21 12:24:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:26,053 INFO L225 Difference]: With dead ends: 274 [2021-08-21 12:24:26,053 INFO L226 Difference]: Without dead ends: 270 [2021-08-21 12:24:26,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:24:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-08-21 12:24:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 197. [2021-08-21 12:24:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.9744897959183674) internal successors, (583), 196 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-08-21 12:24:26,056 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-08-21 12:24:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:26,056 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-08-21 12:24:26,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-08-21 12:24:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:26,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:26,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:26,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 12:24:26,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:26,257 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:26,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1234409325, now seen corresponding path program 102 times [2021-08-21 12:24:26,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:26,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613684659] [2021-08-21 12:24:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:26,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:26,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:26,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613684659] [2021-08-21 12:24:26,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613684659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:26,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996078286] [2021-08-21 12:24:26,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:24:26,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:26,617 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:26,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:24:32,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:24:32,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:24:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:33,032 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:33,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-08-21 12:24:33,334 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:33,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-21 12:24:33,341 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:33,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2021-08-21 12:24:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:33,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996078286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:33,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:33,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:24:33,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007133049] [2021-08-21 12:24:33,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:33,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:33,446 INFO L87 Difference]: Start difference. First operand 197 states and 583 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:33,931 INFO L93 Difference]: Finished difference Result 245 states and 708 transitions. [2021-08-21 12:24:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:33,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:33,932 INFO L225 Difference]: With dead ends: 245 [2021-08-21 12:24:33,932 INFO L226 Difference]: Without dead ends: 241 [2021-08-21 12:24:33,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:24:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-21 12:24:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2021-08-21 12:24:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.9744897959183674) internal successors, (583), 196 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-08-21 12:24:33,935 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-08-21 12:24:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:33,935 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-08-21 12:24:33,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-08-21 12:24:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:33,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:33,935 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:33,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-21 12:24:34,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-08-21 12:24:34,136 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2016406901, now seen corresponding path program 103 times [2021-08-21 12:24:34,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:34,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732258567] [2021-08-21 12:24:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:34,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:34,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:34,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732258567] [2021-08-21 12:24:34,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732258567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:34,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979205281] [2021-08-21 12:24:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:24:34,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:34,537 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:34,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:24:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:40,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:24:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:40,929 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:40,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 67 [2021-08-21 12:24:41,707 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:41,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 122 [2021-08-21 12:24:41,714 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-21 12:24:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:41,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979205281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:41,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:41,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:24:41,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944005676] [2021-08-21 12:24:41,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:41,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:41,968 INFO L87 Difference]: Start difference. First operand 197 states and 583 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:42,477 INFO L93 Difference]: Finished difference Result 246 states and 706 transitions. [2021-08-21 12:24:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:42,478 INFO L225 Difference]: With dead ends: 246 [2021-08-21 12:24:42,478 INFO L226 Difference]: Without dead ends: 242 [2021-08-21 12:24:42,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 545.6ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:24:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-21 12:24:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 195. [2021-08-21 12:24:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.979381443298969) internal successors, (578), 194 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-08-21 12:24:42,480 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-08-21 12:24:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:42,481 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-08-21 12:24:42,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-08-21 12:24:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:42,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:42,481 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:42,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-21 12:24:42,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 12:24:42,682 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:42,682 INFO L82 PathProgramCache]: Analyzing trace with hash -298346633, now seen corresponding path program 104 times [2021-08-21 12:24:42,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:42,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214977738] [2021-08-21 12:24:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:42,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:43,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:43,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214977738] [2021-08-21 12:24:43,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214977738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:43,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743061602] [2021-08-21 12:24:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:24:43,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:43,128 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:43,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:24:49,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:24:49,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:49,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:24:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:49,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:24:49,707 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 56 treesize of output 44 [2021-08-21 12:24:49,708 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 44 treesize of output 32 [2021-08-21 12:24:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:49,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743061602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:49,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:49,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 12:24:49,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816773490] [2021-08-21 12:24:49,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:24:49,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:49,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:24:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:24:49,812 INFO L87 Difference]: Start difference. First operand 195 states and 578 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:50,687 INFO L93 Difference]: Finished difference Result 273 states and 784 transitions. [2021-08-21 12:24:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:24:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:50,688 INFO L225 Difference]: With dead ends: 273 [2021-08-21 12:24:50,688 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 12:24:50,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 945.3ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:24:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 12:24:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 195. [2021-08-21 12:24:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.979381443298969) internal successors, (578), 194 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-08-21 12:24:50,691 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-08-21 12:24:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:50,691 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-08-21 12:24:50,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-08-21 12:24:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:50,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:50,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:50,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:50,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 12:24:50,892 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:50,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1429465369, now seen corresponding path program 105 times [2021-08-21 12:24:50,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:50,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721676788] [2021-08-21 12:24:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:50,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:51,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:51,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721676788] [2021-08-21 12:24:51,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721676788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:51,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690739642] [2021-08-21 12:24:51,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:24:51,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:51,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:51,206 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:51,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:24:57,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:24:57,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:24:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:57,428 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:57,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 76 [2021-08-21 12:24:59,175 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:59,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 112 [2021-08-21 12:24:59,182 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 92 [2021-08-21 12:24:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:59,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690739642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:59,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:59,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:24:59,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991979959] [2021-08-21 12:24:59,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:59,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:59,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:59,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:59,444 INFO L87 Difference]: Start difference. First operand 195 states and 578 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:59,945 INFO L93 Difference]: Finished difference Result 247 states and 707 transitions. [2021-08-21 12:24:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:59,945 INFO L225 Difference]: With dead ends: 247 [2021-08-21 12:24:59,945 INFO L226 Difference]: Without dead ends: 243 [2021-08-21 12:24:59,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:24:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-08-21 12:24:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-08-21 12:24:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-08-21 12:24:59,948 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-08-21 12:24:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:59,948 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-08-21 12:24:59,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-08-21 12:24:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:59,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:59,949 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:59,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 12:25:00,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 12:25:00,149 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1931496295, now seen corresponding path program 106 times [2021-08-21 12:25:00,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:00,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664886356] [2021-08-21 12:25:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:00,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:00,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:00,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664886356] [2021-08-21 12:25:00,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664886356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:00,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590329673] [2021-08-21 12:25:00,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:25:00,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:00,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:00,472 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:00,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:25:06,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:25:06,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:06,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:25:06,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:06,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-21 12:25:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 121 [2021-08-21 12:25:07,155 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 121 treesize of output 97 [2021-08-21 12:25:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:07,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590329673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:07,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:07,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:25:07,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174807098] [2021-08-21 12:25:07,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:25:07,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:25:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:25:07,787 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:08,880 INFO L93 Difference]: Finished difference Result 259 states and 741 transitions. [2021-08-21 12:25:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:25:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:25:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:08,881 INFO L225 Difference]: With dead ends: 259 [2021-08-21 12:25:08,881 INFO L226 Difference]: Without dead ends: 255 [2021-08-21 12:25:08,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1088.9ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:25:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-21 12:25:08,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 191. [2021-08-21 12:25:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.957894736842105) internal successors, (562), 190 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 562 transitions. [2021-08-21 12:25:08,884 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 562 transitions. Word has length 17 [2021-08-21 12:25:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:08,884 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 562 transitions. [2021-08-21 12:25:08,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 562 transitions. [2021-08-21 12:25:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:25:08,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:08,884 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:08,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 12:25:09,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:25:09,085 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1525764139, now seen corresponding path program 107 times [2021-08-21 12:25:09,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:09,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789306230] [2021-08-21 12:25:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:09,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:09,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789306230] [2021-08-21 12:25:09,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789306230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182543563] [2021-08-21 12:25:09,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:25:09,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:09,493 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:09,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:25:14,687 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:25:14,687 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 12:25:15,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:25:15,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:25:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:15,570 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-21 12:25:15,572 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:25:15,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 12:25:15,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:15,772 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. [2021-08-21 12:25:15,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:25:15,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:25:15,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 12:25:15,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:15,779 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:25:15,779 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:25:15,780 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:25:15 BasicIcfg [2021-08-21 12:25:15,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:25:15,780 INFO L168 Benchmark]: Toolchain (without parser) took 683207.85 ms. Allocated memory was 184.5 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 165.1 MB in the beginning and 288.6 MB in the end (delta: -123.5 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 12:25:15,780 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 184.5 MB. Free memory is still 166.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:25:15,780 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.80 ms. Allocated memory is still 184.5 MB. Free memory was 165.1 MB in the beginning and 163.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:25:15,780 INFO L168 Benchmark]: Boogie Preprocessor took 17.40 ms. Allocated memory is still 184.5 MB. Free memory was 163.6 MB in the beginning and 162.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:25:15,781 INFO L168 Benchmark]: RCFGBuilder took 345.21 ms. Allocated memory is still 184.5 MB. Free memory was 162.4 MB in the beginning and 140.8 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:25:15,781 INFO L168 Benchmark]: TraceAbstraction took 682810.96 ms. Allocated memory was 184.5 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 140.4 MB in the beginning and 288.6 MB in the end (delta: -148.2 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 12:25:15,781 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 0.12 ms. Allocated memory is still 184.5 MB. Free memory is still 166.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.80 ms. Allocated memory is still 184.5 MB. Free memory was 165.1 MB in the beginning and 163.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.40 ms. Allocated memory is still 184.5 MB. Free memory was 163.6 MB in the beginning and 162.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 345.21 ms. Allocated memory is still 184.5 MB. Free memory was 162.4 MB in the beginning and 140.8 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 682810.96 ms. Allocated memory was 184.5 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 140.4 MB in the beginning and 288.6 MB in the end (delta: -148.2 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: 92]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 86]: 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 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 82]: 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 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 85]: 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 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 682686.4ms, OverallIterations: 160, TraceHistogramMax: 1, EmptinessCheckTime: 102.3ms, AutomataDifference: 97987.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4146 SDtfs, 8791 SDslu, 21526 SDs, 0 SdLazy, 54858 SolverSat, 785 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30424.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4712 GetRequests, 1919 SyntacticMatches, 157 SemanticMatches, 2636 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6064 ImplicationChecksByTransitivity, 94856.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=153, InterpolantAutomatonStates: 1500, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 642.5ms AutomataMinimizationTime, 159 MinimizatonAttempts, 8859 StatesRemovedByMinimization, 159 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 681.9ms SsaConstructionTime, 2572.8ms SatisfiabilityAnalysisTime, 178906.9ms InterpolantComputationTime, 5114 NumberOfCodeBlocks, 5114 NumberOfCodeBlocksAsserted, 447 NumberOfCheckSat, 4802 ConstructedInterpolants, 315 QuantifiedInterpolants, 127109 SizeOfPredicates, 1645 NumberOfNonLiveVariables, 10328 ConjunctsInSsa, 2879 ConjunctsInUnsatCore, 312 InterpolantComputations, 6 PerfectInterpolantSequences, 16/746 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