/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/chromosome-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:15:11,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:15:11,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:15:11,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:15:11,856 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 12:15:11,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:15:11,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:15:11,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:15:11,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:15:11,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:15:11,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:15:11,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:15:11,874 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:15:11,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:15:11,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:15:11,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:15:11,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:15:11,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:15:11,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:15:11,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:15:11,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:15:11,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:15:11,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:15:11,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:15:11,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:15:11,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:15:11,876 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:15:11,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:15:11,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:15:12,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:15:12,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:15:12,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:15:12,219 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:15:12,221 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:15:12,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl [2021-08-21 12:15:12,223 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl' [2021-08-21 12:15:12,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:15:12,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:15:12,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:15:12,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:15:12,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:15:12,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:15:12,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:15:12,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:15:12,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:15:12,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:15:12,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:15:12,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:15:12,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:15:12,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/1) ... [2021-08-21 12:15:12,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:15:12,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:12,339 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 12:15:12,360 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 12:15:12,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:15:12,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:15:12,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:15:12,375 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:15:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:15:12,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:15:12,375 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:15:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:15:12,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:15:12,375 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:15:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:15:12,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:15:12,376 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 12:15:12,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:15:12,740 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 12:15:12,741 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:15:12 BoogieIcfgContainer [2021-08-21 12:15:12,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:15:12,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:15:12,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:15:12,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:15:12,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:15:12" (1/2) ... [2021-08-21 12:15:12,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f323723 and model type chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:15:12, skipping insertion in model container [2021-08-21 12:15:12,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:15:12" (2/2) ... [2021-08-21 12:15:12,746 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-trans.wvr.bpl [2021-08-21 12:15:12,750 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:15:12,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:15:12,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:15:12,750 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:15:12,806 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:15:12,847 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:15:12,853 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 12:15:12,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:15:12,862 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-08-21 12:15:12,888 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 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 12:15:12,890 INFO L276 IsEmpty]: Start isEmpty. 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 12:15:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:12,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:12,916 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 12:15:12,916 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:12,921 INFO L82 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2021-08-21 12:15:12,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:12,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671119320] [2021-08-21 12:15:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:12,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,102 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 12:15:13,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671119320] [2021-08-21 12:15:13,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671119320] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:15:13,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996485090] [2021-08-21 12:15:13,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:15:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:15:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:15:13,117 INFO L87 Difference]: Start difference. First 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) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 12:15:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,142 INFO L93 Difference]: Finished difference Result 194 states and 539 transitions. [2021-08-21 12:15:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:15:13,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 17 [2021-08-21 12:15:13,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,152 INFO L225 Difference]: With dead ends: 194 [2021-08-21 12:15:13,152 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 12:15:13,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:15:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 12:15:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-08-21 12:15:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8761061946902653) internal successors, (325), 113 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 325 transitions. [2021-08-21 12:15:13,189 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 325 transitions. Word has length 17 [2021-08-21 12:15:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,190 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 325 transitions. [2021-08-21 12:15:13,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 12:15:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 325 transitions. [2021-08-21 12:15:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:13,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,191 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 12:15:13,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:15:13,192 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 904983988, now seen corresponding path program 2 times [2021-08-21 12:15:13,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:13,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195124801] [2021-08-21 12:15:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:13,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,244 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 12:15:13,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195124801] [2021-08-21 12:15:13,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195124801] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:15:13,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221956682] [2021-08-21 12:15:13,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:15:13,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:15:13,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:15:13,247 INFO L87 Difference]: Start difference. First operand 114 states and 325 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 12:15:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,260 INFO L93 Difference]: Finished difference Result 193 states and 552 transitions. [2021-08-21 12:15:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:15:13,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 17 [2021-08-21 12:15:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,266 INFO L225 Difference]: With dead ends: 193 [2021-08-21 12:15:13,266 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 12:15:13,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:15:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 12:15:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2021-08-21 12:15:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-08-21 12:15:13,277 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-08-21 12:15:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,278 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-08-21 12:15:13,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 12:15:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-08-21 12:15:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:13,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,279 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 12:15:13,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:15:13,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:13,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1463195370, now seen corresponding path program 3 times [2021-08-21 12:15:13,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:13,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929474328] [2021-08-21 12:15:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:13,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,352 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 12:15:13,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929474328] [2021-08-21 12:15:13,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929474328] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:15:13,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898768340] [2021-08-21 12:15:13,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:15:13,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:15:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:15:13,354 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 12:15:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,384 INFO L93 Difference]: Finished difference Result 238 states and 687 transitions. [2021-08-21 12:15:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:15:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 17 [2021-08-21 12:15:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,386 INFO L225 Difference]: With dead ends: 238 [2021-08-21 12:15:13,387 INFO L226 Difference]: Without dead ends: 238 [2021-08-21 12:15:13,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-21 12:15:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 149. [2021-08-21 12:15:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.939189189189189) internal successors, (435), 148 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 435 transitions. [2021-08-21 12:15:13,399 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 435 transitions. Word has length 17 [2021-08-21 12:15:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 435 transitions. [2021-08-21 12:15:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 12:15:13,400 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 435 transitions. [2021-08-21 12:15:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:15:13,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:13,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:15:13,401 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1870215385, now seen corresponding path program 1 times [2021-08-21 12:15:13,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:13,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553317275] [2021-08-21 12:15:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:13,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:13,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553317275] [2021-08-21 12:15:13,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553317275] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:15:13,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483384206] [2021-08-21 12:15:13,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:15:13,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:15:13,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:15:13,483 INFO L87 Difference]: Start difference. First operand 149 states and 435 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,496 INFO L93 Difference]: Finished difference Result 237 states and 697 transitions. [2021-08-21 12:15:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:15:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:15:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,499 INFO L225 Difference]: With dead ends: 237 [2021-08-21 12:15:13,500 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 12:15:13,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:15:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 12:15:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-08-21 12:15:13,523 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 12:15:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-08-21 12:15:13,524 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 18 [2021-08-21 12:15:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,524 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-08-21 12:15:13,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-08-21 12:15:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:13,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:13,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:15:13,526 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 239156717, now seen corresponding path program 1 times [2021-08-21 12:15:13,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:13,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213209070] [2021-08-21 12:15:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:13,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:13,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213209070] [2021-08-21 12:15:13,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213209070] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:13,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678560731] [2021-08-21 12:15:13,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:13,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:13,581 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,609 INFO L93 Difference]: Finished difference Result 199 states and 585 transitions. [2021-08-21 12:15:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:15:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,612 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:15:13,612 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 12:15:13,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:15:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 12:15:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-08-21 12:15:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9545454545454546) internal successors, (585), 198 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 585 transitions. [2021-08-21 12:15:13,628 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 585 transitions. Word has length 19 [2021-08-21 12:15:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,628 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 585 transitions. [2021-08-21 12:15:13,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 585 transitions. [2021-08-21 12:15:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:13,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:13,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:15:13,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash -11164707, now seen corresponding path program 2 times [2021-08-21 12:15:13,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:13,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48335289] [2021-08-21 12:15:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:13,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:13,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48335289] [2021-08-21 12:15:13,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48335289] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:13,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388210949] [2021-08-21 12:15:13,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:13,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:13,702 INFO L87 Difference]: Start difference. First operand 199 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,744 INFO L93 Difference]: Finished difference Result 303 states and 870 transitions. [2021-08-21 12:15:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:15:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,746 INFO L225 Difference]: With dead ends: 303 [2021-08-21 12:15:13,746 INFO L226 Difference]: Without dead ends: 303 [2021-08-21 12:15:13,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-21 12:15:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 206. [2021-08-21 12:15:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9902439024390244) internal successors, (613), 205 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 613 transitions. [2021-08-21 12:15:13,754 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 613 transitions. Word has length 19 [2021-08-21 12:15:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,760 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 613 transitions. [2021-08-21 12:15:13,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 613 transitions. [2021-08-21 12:15:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:13,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,765 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:13,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:15:13,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash 575750895, now seen corresponding path program 3 times [2021-08-21 12:15:13,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:13,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431523439] [2021-08-21 12:15:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:13,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:13,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431523439] [2021-08-21 12:15:13,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431523439] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:13,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872515624] [2021-08-21 12:15:13,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:13,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:13,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:13,822 INFO L87 Difference]: Start difference. First operand 206 states and 613 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,850 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2021-08-21 12:15:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:15:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,852 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:15:13,852 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:15:13,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:15:13,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:15:13,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-08-21 12:15:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9560975609756097) internal successors, (606), 205 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 606 transitions. [2021-08-21 12:15:13,857 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 606 transitions. Word has length 19 [2021-08-21 12:15:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,857 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 606 transitions. [2021-08-21 12:15:13,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 606 transitions. [2021-08-21 12:15:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:13,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,858 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:13,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:15:13,858 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2059614901, now seen corresponding path program 4 times [2021-08-21 12:15:13,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:13,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519163981] [2021-08-21 12:15:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:13,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:13,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:13,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519163981] [2021-08-21 12:15:13,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519163981] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:13,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:13,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:13,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615809633] [2021-08-21 12:15:13,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:13,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:13,943 INFO L87 Difference]: Start difference. First operand 206 states and 606 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,985 INFO L93 Difference]: Finished difference Result 301 states and 859 transitions. [2021-08-21 12:15:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:15:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,987 INFO L225 Difference]: With dead ends: 301 [2021-08-21 12:15:13,987 INFO L226 Difference]: Without dead ends: 301 [2021-08-21 12:15:13,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:15:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-08-21 12:15:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 214. [2021-08-21 12:15:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.995305164319249) internal successors, (638), 213 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 638 transitions. [2021-08-21 12:15:14,002 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 638 transitions. Word has length 19 [2021-08-21 12:15:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:14,002 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 638 transitions. [2021-08-21 12:15:14,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 638 transitions. [2021-08-21 12:15:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:14,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:14,003 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:14,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:15:14,004 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1648436793, now seen corresponding path program 5 times [2021-08-21 12:15:14,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:14,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054108911] [2021-08-21 12:15:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:14,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:14,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054108911] [2021-08-21 12:15:14,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054108911] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:14,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:14,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:14,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351114743] [2021-08-21 12:15:14,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:14,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:14,045 INFO L87 Difference]: Start difference. First operand 214 states and 638 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:14,084 INFO L93 Difference]: Finished difference Result 314 states and 878 transitions. [2021-08-21 12:15:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:15:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:14,086 INFO L225 Difference]: With dead ends: 314 [2021-08-21 12:15:14,086 INFO L226 Difference]: Without dead ends: 301 [2021-08-21 12:15:14,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-08-21 12:15:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 207. [2021-08-21 12:15:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.9611650485436893) internal successors, (610), 206 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 610 transitions. [2021-08-21 12:15:14,093 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 610 transitions. Word has length 19 [2021-08-21 12:15:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 610 transitions. [2021-08-21 12:15:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 610 transitions. [2021-08-21 12:15:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:14,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:14,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:14,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 12:15:14,094 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2108674925, now seen corresponding path program 6 times [2021-08-21 12:15:14,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:14,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905556136] [2021-08-21 12:15:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:14,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:14,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905556136] [2021-08-21 12:15:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905556136] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:14,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:14,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:14,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426670751] [2021-08-21 12:15:14,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:14,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:14,127 INFO L87 Difference]: Start difference. First operand 207 states and 610 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:14,149 INFO L93 Difference]: Finished difference Result 231 states and 656 transitions. [2021-08-21 12:15:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:15:14,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:14,151 INFO L225 Difference]: With dead ends: 231 [2021-08-21 12:15:14,151 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:15:14,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:15:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:15:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-08-21 12:15:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 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 12:15:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-08-21 12:15:14,156 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-08-21 12:15:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:14,157 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-08-21 12:15:14,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-08-21 12:15:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:14,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:14,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:14,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 12:15:14,158 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:14,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:14,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1791885482, now seen corresponding path program 1 times [2021-08-21 12:15:14,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:14,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616469603] [2021-08-21 12:15:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:14,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:14,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616469603] [2021-08-21 12:15:14,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616469603] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:14,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:14,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:14,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226572044] [2021-08-21 12:15:14,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:14,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:14,200 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:14,233 INFO L93 Difference]: Finished difference Result 213 states and 621 transitions. [2021-08-21 12:15:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:15:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:14,234 INFO L225 Difference]: With dead ends: 213 [2021-08-21 12:15:14,234 INFO L226 Difference]: Without dead ends: 213 [2021-08-21 12:15:14,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:15:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-21 12:15:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 189. [2021-08-21 12:15:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 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 12:15:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-21 12:15:14,239 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-08-21 12:15:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:14,240 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-21 12:15:14,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-21 12:15:14,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:14,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:14,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:14,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 12:15:14,241 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash 779192950, now seen corresponding path program 2 times [2021-08-21 12:15:14,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:14,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654387119] [2021-08-21 12:15:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:14,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:14,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654387119] [2021-08-21 12:15:14,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654387119] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:14,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:14,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:15:14,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458883239] [2021-08-21 12:15:14,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:15:14,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:15:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:15:14,285 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:14,318 INFO L93 Difference]: Finished difference Result 231 states and 675 transitions. [2021-08-21 12:15:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:15:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:14,319 INFO L225 Difference]: With dead ends: 231 [2021-08-21 12:15:14,319 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:15:14,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:15:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 189. [2021-08-21 12:15:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 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 12:15:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-21 12:15:14,324 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-08-21 12:15:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:14,324 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-21 12:15:14,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 12:15:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-21 12:15:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:14,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:14,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:14,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 12:15:14,325 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash -356903725, now seen corresponding path program 1 times [2021-08-21 12:15:14,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:14,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847246462] [2021-08-21 12:15:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,500 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 12:15:14,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:14,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847246462] [2021-08-21 12:15:14,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847246462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:14,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19484351] [2021-08-21 12:15:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:14,502 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 12:15:14,534 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 12:15:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:14,723 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:14,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:14,970 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:14,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:15:15,031 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 12:15:15,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19484351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:15,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:15,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:15,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301311972] [2021-08-21 12:15:15,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:15,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:15,032 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:15,755 INFO L93 Difference]: Finished difference Result 430 states and 1253 transitions. [2021-08-21 12:15:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:15:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:15,757 INFO L225 Difference]: With dead ends: 430 [2021-08-21 12:15:15,757 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:15:15,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:15:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:15:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 211. [2021-08-21 12:15:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-08-21 12:15:15,764 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 20 [2021-08-21 12:15:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:15,764 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-08-21 12:15:15,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-08-21 12:15:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:15,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:15,765 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:15,785 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 12:15:15,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:15:15,982 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:15,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1995363379, now seen corresponding path program 2 times [2021-08-21 12:15:15,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:15,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187628440] [2021-08-21 12:15:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:15,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:16,169 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 12:15:16,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:16,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187628440] [2021-08-21 12:15:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187628440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:16,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809437473] [2021-08-21 12:15:16,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:16,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:16,184 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 12:15:16,208 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 12:15:16,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:16,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:16,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:16,405 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:16,553 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:16,553 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-08-21 12:15:16,593 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 12:15:16,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809437473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:16,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:16,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:16,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331473131] [2021-08-21 12:15:16,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:16,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:16,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:16,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:16,595 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:17,084 INFO L93 Difference]: Finished difference Result 350 states and 1015 transitions. [2021-08-21 12:15:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:15:17,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:17,087 INFO L225 Difference]: With dead ends: 350 [2021-08-21 12:15:17,088 INFO L226 Difference]: Without dead ends: 335 [2021-08-21 12:15:17,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:15:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-21 12:15:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 217. [2021-08-21 12:15:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.912037037037037) internal successors, (629), 216 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 629 transitions. [2021-08-21 12:15:17,110 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 629 transitions. Word has length 20 [2021-08-21 12:15:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:17,110 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 629 transitions. [2021-08-21 12:15:17,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 629 transitions. [2021-08-21 12:15:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:17,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:17,112 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:17,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:17,312 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,SelfDestructingSolverStorable13 [2021-08-21 12:15:17,312 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash 409554857, now seen corresponding path program 3 times [2021-08-21 12:15:17,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:17,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671840322] [2021-08-21 12:15:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:17,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:17,511 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 12:15:17,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:17,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671840322] [2021-08-21 12:15:17,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671840322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:17,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491230514] [2021-08-21 12:15:17,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:17,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:17,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:17,512 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 12:15:17,537 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 12:15:17,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:17,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:17,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:17,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:17,738 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:17,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:17,779 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:17,779 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-08-21 12:15:17,853 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 12:15:17,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491230514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:17,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:17,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:17,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991083215] [2021-08-21 12:15:17,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:17,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:17,854 INFO L87 Difference]: Start difference. First operand 217 states and 629 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:18,313 INFO L93 Difference]: Finished difference Result 356 states and 1028 transitions. [2021-08-21 12:15:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:15:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:18,315 INFO L225 Difference]: With dead ends: 356 [2021-08-21 12:15:18,315 INFO L226 Difference]: Without dead ends: 341 [2021-08-21 12:15:18,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:15:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-08-21 12:15:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 215. [2021-08-21 12:15:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.9065420560747666) internal successors, (622), 214 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 622 transitions. [2021-08-21 12:15:18,321 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 622 transitions. Word has length 20 [2021-08-21 12:15:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:18,321 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 622 transitions. [2021-08-21 12:15:18,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 622 transitions. [2021-08-21 12:15:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:18,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:18,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:18,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 12:15:18,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:18,533 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash 997300179, now seen corresponding path program 4 times [2021-08-21 12:15:18,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:18,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005863074] [2021-08-21 12:15:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:18,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:18,709 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 12:15:18,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:18,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005863074] [2021-08-21 12:15:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005863074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:18,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200327480] [2021-08-21 12:15:18,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:18,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:18,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:18,711 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 12:15:18,713 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 12:15:18,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:18,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:18,938 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 19 treesize of output 15 [2021-08-21 12:15:18,979 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:18,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:15:18,985 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:18,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 25 [2021-08-21 12:15:19,052 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 12:15:19,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200327480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:19,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:19,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:19,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144039983] [2021-08-21 12:15:19,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:19,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:19,054 INFO L87 Difference]: Start difference. First operand 215 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:19,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:19,409 INFO L93 Difference]: Finished difference Result 339 states and 983 transitions. [2021-08-21 12:15:19,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:15:19,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:19,411 INFO L225 Difference]: With dead ends: 339 [2021-08-21 12:15:19,411 INFO L226 Difference]: Without dead ends: 324 [2021-08-21 12:15:19,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:15:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-08-21 12:15:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 227. [2021-08-21 12:15:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.911504424778761) internal successors, (658), 226 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 658 transitions. [2021-08-21 12:15:19,416 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 658 transitions. Word has length 20 [2021-08-21 12:15:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:19,417 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 658 transitions. [2021-08-21 12:15:19,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 658 transitions. [2021-08-21 12:15:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:19,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:19,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:19,436 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 12:15:19,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:15:19,635 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:19,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1270231183, now seen corresponding path program 5 times [2021-08-21 12:15:19,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:19,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366195852] [2021-08-21 12:15:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:19,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:19,788 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 12:15:19,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:19,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366195852] [2021-08-21 12:15:19,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366195852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:19,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576515096] [2021-08-21 12:15:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:19,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:19,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:19,790 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 12:15:19,791 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 12:15:19,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:19,967 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 19 treesize of output 15 [2021-08-21 12:15:20,049 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 21 treesize of output 17 [2021-08-21 12:15:20,086 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 12:15:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576515096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:20,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:20,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:20,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761261852] [2021-08-21 12:15:20,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:20,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:20,088 INFO L87 Difference]: Start difference. First operand 227 states and 658 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:20,778 INFO L93 Difference]: Finished difference Result 487 states and 1405 transitions. [2021-08-21 12:15:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:15:20,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:20,780 INFO L225 Difference]: With dead ends: 487 [2021-08-21 12:15:20,780 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 12:15:20,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:15:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 12:15:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 241. [2021-08-21 12:15:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.995833333333333) internal successors, (719), 240 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 719 transitions. [2021-08-21 12:15:20,787 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 719 transitions. Word has length 20 [2021-08-21 12:15:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:20,788 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 719 transitions. [2021-08-21 12:15:20,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 719 transitions. [2021-08-21 12:15:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:20,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:20,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:20,820 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 12:15:21,015 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,SelfDestructingSolverStorable16 [2021-08-21 12:15:21,016 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1276978829, now seen corresponding path program 6 times [2021-08-21 12:15:21,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:21,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780837850] [2021-08-21 12:15:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:21,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:21,182 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 12:15:21,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:21,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780837850] [2021-08-21 12:15:21,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780837850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:21,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021655490] [2021-08-21 12:15:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:21,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:21,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:21,183 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 12:15:21,216 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 12:15:21,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:15:21,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:21,411 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 35 treesize of output 31 [2021-08-21 12:15:21,652 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:21,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:15:21,658 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:21,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 18 [2021-08-21 12:15:21,699 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 12:15:21,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021655490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:21,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:21,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:21,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22413447] [2021-08-21 12:15:21,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:21,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:21,701 INFO L87 Difference]: Start difference. First operand 241 states and 719 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:22,098 INFO L93 Difference]: Finished difference Result 396 states and 1162 transitions. [2021-08-21 12:15:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:15:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:22,100 INFO L225 Difference]: With dead ends: 396 [2021-08-21 12:15:22,100 INFO L226 Difference]: Without dead ends: 381 [2021-08-21 12:15:22,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-21 12:15:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 247. [2021-08-21 12:15:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 3.016260162601626) internal successors, (742), 246 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 742 transitions. [2021-08-21 12:15:22,107 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 742 transitions. Word has length 20 [2021-08-21 12:15:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:22,108 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 742 transitions. [2021-08-21 12:15:22,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 742 transitions. [2021-08-21 12:15:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:22,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:22,108 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:22,127 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 12:15:22,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:15:22,325 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1432179945, now seen corresponding path program 7 times [2021-08-21 12:15:22,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:22,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908833643] [2021-08-21 12:15:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:22,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:22,502 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 12:15:22,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:22,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908833643] [2021-08-21 12:15:22,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908833643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:22,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846843755] [2021-08-21 12:15:22,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:22,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:22,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:22,504 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 12:15:22,504 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 12:15:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:22,759 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 35 treesize of output 31 [2021-08-21 12:15:22,874 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:22,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:22,880 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:15:22,948 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 12:15:22,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846843755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:22,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:22,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:22,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210800221] [2021-08-21 12:15:22,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:22,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:22,950 INFO L87 Difference]: Start difference. First operand 247 states and 742 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:23,412 INFO L93 Difference]: Finished difference Result 390 states and 1149 transitions. [2021-08-21 12:15:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:15:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:23,414 INFO L225 Difference]: With dead ends: 390 [2021-08-21 12:15:23,414 INFO L226 Difference]: Without dead ends: 375 [2021-08-21 12:15:23,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-21 12:15:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 245. [2021-08-21 12:15:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.012295081967213) internal successors, (735), 244 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 735 transitions. [2021-08-21 12:15:23,420 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 735 transitions. Word has length 20 [2021-08-21 12:15:23,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:23,420 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 735 transitions. [2021-08-21 12:15:23,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 735 transitions. [2021-08-21 12:15:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:23,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:23,421 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:23,437 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 12:15:23,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:23,638 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash 970633523, now seen corresponding path program 8 times [2021-08-21 12:15:23,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:23,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411792750] [2021-08-21 12:15:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:23,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:23,838 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 12:15:23,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:23,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411792750] [2021-08-21 12:15:23,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411792750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:23,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076539780] [2021-08-21 12:15:23,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:23,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:23,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:23,840 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 12:15:23,841 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 12:15:24,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:24,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:24,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:24,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:24,092 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 35 treesize of output 31 [2021-08-21 12:15:24,235 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:24,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:24,242 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:24,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:15:24,304 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 12:15:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076539780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:24,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:24,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:24,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152598065] [2021-08-21 12:15:24,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:24,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:24,305 INFO L87 Difference]: Start difference. First operand 245 states and 735 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:24,618 INFO L93 Difference]: Finished difference Result 382 states and 1125 transitions. [2021-08-21 12:15:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:15:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:24,620 INFO L225 Difference]: With dead ends: 382 [2021-08-21 12:15:24,620 INFO L226 Difference]: Without dead ends: 367 [2021-08-21 12:15:24,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-21 12:15:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 245. [2021-08-21 12:15:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.0163934426229506) internal successors, (736), 244 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 736 transitions. [2021-08-21 12:15:24,626 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 736 transitions. Word has length 20 [2021-08-21 12:15:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:24,626 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 736 transitions. [2021-08-21 12:15:24,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 736 transitions. [2021-08-21 12:15:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:24,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:24,627 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:24,649 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 12:15:24,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:24,828 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash -638700315, now seen corresponding path program 9 times [2021-08-21 12:15:24,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:24,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320608459] [2021-08-21 12:15:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:24,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:25,036 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 12:15:25,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:25,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320608459] [2021-08-21 12:15:25,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320608459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:25,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285721164] [2021-08-21 12:15:25,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:25,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:25,037 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 12:15:25,038 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 12:15:25,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:25,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:25,318 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 35 treesize of output 31 [2021-08-21 12:15:25,362 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:25,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:15:25,368 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:25,368 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-08-21 12:15:25,487 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 12:15:25,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285721164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:25,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:25,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:25,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128924084] [2021-08-21 12:15:25,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:25,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:25,489 INFO L87 Difference]: Start difference. First operand 245 states and 736 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:26,037 INFO L93 Difference]: Finished difference Result 401 states and 1183 transitions. [2021-08-21 12:15:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:15:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:26,039 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:15:26,039 INFO L226 Difference]: Without dead ends: 386 [2021-08-21 12:15:26,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-21 12:15:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 244. [2021-08-21 12:15:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.0082304526748973) internal successors, (731), 243 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 731 transitions. [2021-08-21 12:15:26,069 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 731 transitions. Word has length 20 [2021-08-21 12:15:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:26,070 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 731 transitions. [2021-08-21 12:15:26,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 731 transitions. [2021-08-21 12:15:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:26,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:26,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:26,090 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 12:15:26,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:26,272 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:26,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1543838351, now seen corresponding path program 10 times [2021-08-21 12:15:26,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:26,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327842888] [2021-08-21 12:15:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:26,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:26,395 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 12:15:26,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:26,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327842888] [2021-08-21 12:15:26,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327842888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:26,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919331311] [2021-08-21 12:15:26,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:26,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:26,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:26,396 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 12:15:26,400 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 12:15:26,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:26,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:26,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:26,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:26,709 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 19 treesize of output 15 [2021-08-21 12:15:26,741 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 21 treesize of output 17 [2021-08-21 12:15:26,807 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 12:15:26,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919331311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:26,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:26,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:15:26,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048734229] [2021-08-21 12:15:26,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:15:26,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:15:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:26,819 INFO L87 Difference]: Start difference. First operand 244 states and 731 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:15:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:27,019 INFO L93 Difference]: Finished difference Result 316 states and 932 transitions. [2021-08-21 12:15:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 20 [2021-08-21 12:15:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:27,021 INFO L225 Difference]: With dead ends: 316 [2021-08-21 12:15:27,021 INFO L226 Difference]: Without dead ends: 301 [2021-08-21 12:15:27,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-08-21 12:15:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 244. [2021-08-21 12:15:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.0082304526748973) internal successors, (731), 243 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 731 transitions. [2021-08-21 12:15:27,025 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 731 transitions. Word has length 20 [2021-08-21 12:15:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:27,026 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 731 transitions. [2021-08-21 12:15:27,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:15:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 731 transitions. [2021-08-21 12:15:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:27,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:27,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:27,081 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 12:15:27,252 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,SelfDestructingSolverStorable21 [2021-08-21 12:15:27,253 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 332106461, now seen corresponding path program 11 times [2021-08-21 12:15:27,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:27,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552651990] [2021-08-21 12:15:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:27,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:27,385 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 12:15:27,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:27,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552651990] [2021-08-21 12:15:27,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552651990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:27,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246087541] [2021-08-21 12:15:27,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:27,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:27,386 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 12:15:27,387 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 12:15:27,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:15:27,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:27,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:27,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:15:27,726 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 21 treesize of output 17 [2021-08-21 12:15:27,765 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 12:15:27,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246087541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:27,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:27,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:15:27,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821918406] [2021-08-21 12:15:27,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:15:27,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:15:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:27,766 INFO L87 Difference]: Start difference. First operand 244 states and 731 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:28,140 INFO L93 Difference]: Finished difference Result 455 states and 1342 transitions. [2021-08-21 12:15:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:15:28,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:28,142 INFO L225 Difference]: With dead ends: 455 [2021-08-21 12:15:28,142 INFO L226 Difference]: Without dead ends: 440 [2021-08-21 12:15:28,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-21 12:15:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 248. [2021-08-21 12:15:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0080971659919027) internal successors, (743), 247 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 743 transitions. [2021-08-21 12:15:28,147 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 743 transitions. Word has length 20 [2021-08-21 12:15:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:28,147 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 743 transitions. [2021-08-21 12:15:28,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 743 transitions. [2021-08-21 12:15:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:28,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:28,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:28,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 12:15:28,363 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,SelfDestructingSolverStorable22 [2021-08-21 12:15:28,363 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash 473066723, now seen corresponding path program 12 times [2021-08-21 12:15:28,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:28,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120101428] [2021-08-21 12:15:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:28,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:28,496 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 12:15:28,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:28,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120101428] [2021-08-21 12:15:28,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120101428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:28,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320811598] [2021-08-21 12:15:28,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:28,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:28,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:28,498 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 12:15:28,499 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 12:15:28,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:15:28,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:28,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:28,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:28,830 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 19 treesize of output 15 [2021-08-21 12:15:28,888 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 21 treesize of output 17 [2021-08-21 12:15:28,922 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 12:15:28,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320811598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:28,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:28,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:15:28,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750015326] [2021-08-21 12:15:28,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:28,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:28,924 INFO L87 Difference]: Start difference. First operand 248 states and 743 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 12:15:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:29,302 INFO L93 Difference]: Finished difference Result 380 states and 1127 transitions. [2021-08-21 12:15:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:15:29,302 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 20 [2021-08-21 12:15:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:29,303 INFO L225 Difference]: With dead ends: 380 [2021-08-21 12:15:29,303 INFO L226 Difference]: Without dead ends: 365 [2021-08-21 12:15:29,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:15:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-21 12:15:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 255. [2021-08-21 12:15:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.015748031496063) internal successors, (766), 254 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 766 transitions. [2021-08-21 12:15:29,308 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 766 transitions. Word has length 20 [2021-08-21 12:15:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:29,308 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 766 transitions. [2021-08-21 12:15:29,308 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 12:15:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 766 transitions. [2021-08-21 12:15:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:29,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:29,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:29,326 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 12:15:29,524 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,SelfDestructingSolverStorable23 [2021-08-21 12:15:29,525 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1742606745, now seen corresponding path program 13 times [2021-08-21 12:15:29,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:29,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488632737] [2021-08-21 12:15:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:29,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:29,679 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 12:15:29,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:29,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488632737] [2021-08-21 12:15:29,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488632737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:29,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726964689] [2021-08-21 12:15:29,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:29,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:29,681 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 12:15:29,682 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 12:15:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:29,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:30,015 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 19 treesize of output 15 [2021-08-21 12:15:30,033 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 21 treesize of output 17 [2021-08-21 12:15:30,105 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 12:15:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726964689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:30,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:30,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:15:30,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671340639] [2021-08-21 12:15:30,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:30,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:30,106 INFO L87 Difference]: Start difference. First operand 255 states and 766 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 12:15:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:30,490 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2021-08-21 12:15:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:15:30,491 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 20 [2021-08-21 12:15:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:30,492 INFO L225 Difference]: With dead ends: 386 [2021-08-21 12:15:30,492 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 12:15:30,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:15:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 12:15:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 252. [2021-08-21 12:15:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.00796812749004) internal successors, (755), 251 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 755 transitions. [2021-08-21 12:15:30,502 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 755 transitions. Word has length 20 [2021-08-21 12:15:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:30,503 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 755 transitions. [2021-08-21 12:15:30,503 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 12:15:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 755 transitions. [2021-08-21 12:15:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:30,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:30,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:30,523 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 12:15:30,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 12:15:30,721 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash 403564015, now seen corresponding path program 14 times [2021-08-21 12:15:30,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:30,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504019900] [2021-08-21 12:15:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:30,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:30,875 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 12:15:30,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:30,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504019900] [2021-08-21 12:15:30,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504019900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:30,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681401505] [2021-08-21 12:15:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:30,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:30,876 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 12:15:30,877 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 12:15:31,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:31,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:31,244 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 19 treesize of output 15 [2021-08-21 12:15:31,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:15:31,327 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 12:15:31,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681401505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:31,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:31,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:15:31,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765998908] [2021-08-21 12:15:31,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:31,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:31,329 INFO L87 Difference]: Start difference. First operand 252 states and 755 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 12:15:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:31,593 INFO L93 Difference]: Finished difference Result 358 states and 1061 transitions. [2021-08-21 12:15:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:31,596 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 20 [2021-08-21 12:15:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:31,598 INFO L225 Difference]: With dead ends: 358 [2021-08-21 12:15:31,598 INFO L226 Difference]: Without dead ends: 343 [2021-08-21 12:15:31,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-08-21 12:15:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 265. [2021-08-21 12:15:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.003787878787879) internal successors, (793), 264 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 793 transitions. [2021-08-21 12:15:31,604 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 793 transitions. Word has length 20 [2021-08-21 12:15:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:31,604 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 793 transitions. [2021-08-21 12:15:31,604 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 12:15:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 793 transitions. [2021-08-21 12:15:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:31,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:31,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:31,633 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 12:15:31,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:31,823 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash -305702989, now seen corresponding path program 15 times [2021-08-21 12:15:31,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:31,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841912491] [2021-08-21 12:15:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:31,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:31,988 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 12:15:31,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:31,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841912491] [2021-08-21 12:15:31,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841912491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:31,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521154367] [2021-08-21 12:15:31,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:31,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:31,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:32,006 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 12:15:32,070 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 12:15:32,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:15:32,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:32,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:32,416 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 19 treesize of output 15 [2021-08-21 12:15:32,524 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 21 treesize of output 17 [2021-08-21 12:15:32,547 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 12:15:32,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521154367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:32,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:32,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:15:32,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358839241] [2021-08-21 12:15:32,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:32,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:32,548 INFO L87 Difference]: Start difference. First operand 265 states and 793 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 12:15:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:32,708 INFO L93 Difference]: Finished difference Result 367 states and 1080 transitions. [2021-08-21 12:15:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:32,708 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 20 [2021-08-21 12:15:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:32,710 INFO L225 Difference]: With dead ends: 367 [2021-08-21 12:15:32,710 INFO L226 Difference]: Without dead ends: 352 [2021-08-21 12:15:32,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-08-21 12:15:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 269. [2021-08-21 12:15:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0186567164179103) internal successors, (809), 268 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 809 transitions. [2021-08-21 12:15:32,714 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 809 transitions. Word has length 20 [2021-08-21 12:15:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:32,714 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 809 transitions. [2021-08-21 12:15:32,714 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 12:15:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 809 transitions. [2021-08-21 12:15:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:32,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:32,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:32,735 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 12:15:32,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:15:32,916 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1891511511, now seen corresponding path program 16 times [2021-08-21 12:15:32,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:32,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192120279] [2021-08-21 12:15:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:32,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:33,038 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 12:15:33,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:33,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192120279] [2021-08-21 12:15:33,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192120279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:33,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641481910] [2021-08-21 12:15:33,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:33,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:33,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:33,039 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 12:15:33,040 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 12:15:33,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:33,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:33,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:33,411 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 19 treesize of output 15 [2021-08-21 12:15:33,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:15:33,516 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 12:15:33,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641481910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:33,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:33,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:15:33,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473179991] [2021-08-21 12:15:33,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:15:33,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:15:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:33,517 INFO L87 Difference]: Start difference. First operand 269 states and 809 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:15:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:33,639 INFO L93 Difference]: Finished difference Result 361 states and 1067 transitions. [2021-08-21 12:15:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 20 [2021-08-21 12:15:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:33,641 INFO L225 Difference]: With dead ends: 361 [2021-08-21 12:15:33,641 INFO L226 Difference]: Without dead ends: 346 [2021-08-21 12:15:33,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-21 12:15:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2021-08-21 12:15:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0186567164179103) internal successors, (809), 268 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 809 transitions. [2021-08-21 12:15:33,646 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 809 transitions. Word has length 20 [2021-08-21 12:15:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:33,646 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 809 transitions. [2021-08-21 12:15:33,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:15:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 809 transitions. [2021-08-21 12:15:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:33,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:33,646 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:33,664 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 12:15:33,866 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,SelfDestructingSolverStorable27 [2021-08-21 12:15:33,866 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:33,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1941909363, now seen corresponding path program 17 times [2021-08-21 12:15:33,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:33,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460023945] [2021-08-21 12:15:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:33,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:34,036 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 12:15:34,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:34,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460023945] [2021-08-21 12:15:34,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460023945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:34,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354708527] [2021-08-21 12:15:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:34,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:34,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:34,040 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 12:15:34,041 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 12:15:34,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:34,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:34,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:34,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:34,419 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 19 treesize of output 15 [2021-08-21 12:15:34,482 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 21 treesize of output 17 [2021-08-21 12:15:34,552 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 12:15:34,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354708527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:34,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:34,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:15:34,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907205460] [2021-08-21 12:15:34,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:15:34,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:15:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:34,553 INFO L87 Difference]: Start difference. First operand 269 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:34,768 INFO L93 Difference]: Finished difference Result 395 states and 1167 transitions. [2021-08-21 12:15:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:34,770 INFO L225 Difference]: With dead ends: 395 [2021-08-21 12:15:34,770 INFO L226 Difference]: Without dead ends: 380 [2021-08-21 12:15:34,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-21 12:15:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 266. [2021-08-21 12:15:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0113207547169814) internal successors, (798), 265 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 798 transitions. [2021-08-21 12:15:34,774 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 798 transitions. Word has length 20 [2021-08-21 12:15:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:34,774 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 798 transitions. [2021-08-21 12:15:34,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 798 transitions. [2021-08-21 12:15:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:34,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:34,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:34,792 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 12:15:34,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:15:34,989 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 332575525, now seen corresponding path program 18 times [2021-08-21 12:15:34,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:34,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513429236] [2021-08-21 12:15:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:34,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:35,124 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 12:15:35,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:35,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513429236] [2021-08-21 12:15:35,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513429236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:35,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860845640] [2021-08-21 12:15:35,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:35,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:35,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:35,126 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 12:15:35,127 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 12:15:35,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:15:35,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:35,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:35,534 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 19 treesize of output 15 [2021-08-21 12:15:35,560 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 21 treesize of output 17 [2021-08-21 12:15:35,615 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 12:15:35,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860845640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:35,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:35,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:15:35,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159231100] [2021-08-21 12:15:35,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:15:35,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:35,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:15:35,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:35,616 INFO L87 Difference]: Start difference. First operand 266 states and 798 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:15:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:35,728 INFO L93 Difference]: Finished difference Result 364 states and 1073 transitions. [2021-08-21 12:15:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:35,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 20 [2021-08-21 12:15:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:35,730 INFO L225 Difference]: With dead ends: 364 [2021-08-21 12:15:35,730 INFO L226 Difference]: Without dead ends: 349 [2021-08-21 12:15:35,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-21 12:15:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 265. [2021-08-21 12:15:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.003787878787879) internal successors, (793), 264 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 793 transitions. [2021-08-21 12:15:35,734 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 793 transitions. Word has length 20 [2021-08-21 12:15:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:35,734 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 793 transitions. [2021-08-21 12:15:35,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:15:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 793 transitions. [2021-08-21 12:15:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:35,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:35,735 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:35,754 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 12:15:35,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:35,955 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2022518429, now seen corresponding path program 19 times [2021-08-21 12:15:35,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:35,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761027104] [2021-08-21 12:15:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:35,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:36,105 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 12:15:36,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:36,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761027104] [2021-08-21 12:15:36,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761027104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:36,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912248193] [2021-08-21 12:15:36,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:36,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:36,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:36,121 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 12:15:36,124 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 12:15:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:36,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:36,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:36,581 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 19 treesize of output 15 [2021-08-21 12:15:36,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:15:36,720 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 12:15:36,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912248193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:36,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:36,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:15:36,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944889223] [2021-08-21 12:15:36,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:15:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:15:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:36,721 INFO L87 Difference]: Start difference. First operand 265 states and 793 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:36,916 INFO L93 Difference]: Finished difference Result 374 states and 1103 transitions. [2021-08-21 12:15:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:36,917 INFO L225 Difference]: With dead ends: 374 [2021-08-21 12:15:36,917 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 12:15:36,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 12:15:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 265. [2021-08-21 12:15:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.003787878787879) internal successors, (793), 264 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 793 transitions. [2021-08-21 12:15:36,921 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 793 transitions. Word has length 20 [2021-08-21 12:15:36,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:36,921 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 793 transitions. [2021-08-21 12:15:36,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 793 transitions. [2021-08-21 12:15:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:36,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:36,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:36,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:37,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:37,123 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:37,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:37,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1526750339, now seen corresponding path program 20 times [2021-08-21 12:15:37,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:37,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588665574] [2021-08-21 12:15:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:37,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:37,313 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 12:15:37,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:37,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588665574] [2021-08-21 12:15:37,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588665574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:37,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652241282] [2021-08-21 12:15:37,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:37,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:37,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:37,314 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 12:15:37,342 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 12:15:37,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:37,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:37,868 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:37,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:15:37,912 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:37,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:15:37,918 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:37,918 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 26 treesize of output 25 [2021-08-21 12:15:37,992 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 12:15:37,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652241282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:37,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:37,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:37,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838241067] [2021-08-21 12:15:37,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:37,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:37,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:37,993 INFO L87 Difference]: Start difference. First operand 265 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:38,275 INFO L93 Difference]: Finished difference Result 370 states and 1097 transitions. [2021-08-21 12:15:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:15:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:38,277 INFO L225 Difference]: With dead ends: 370 [2021-08-21 12:15:38,277 INFO L226 Difference]: Without dead ends: 355 [2021-08-21 12:15:38,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-21 12:15:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 263. [2021-08-21 12:15:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0076335877862594) internal successors, (788), 262 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 788 transitions. [2021-08-21 12:15:38,281 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 788 transitions. Word has length 20 [2021-08-21 12:15:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:38,281 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 788 transitions. [2021-08-21 12:15:38,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 788 transitions. [2021-08-21 12:15:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:38,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:38,282 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:38,300 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 12:15:38,494 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,SelfDestructingSolverStorable31 [2021-08-21 12:15:38,494 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:38,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2056548067, now seen corresponding path program 21 times [2021-08-21 12:15:38,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:38,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371333902] [2021-08-21 12:15:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:38,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:38,655 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 12:15:38,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:38,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371333902] [2021-08-21 12:15:38,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371333902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:38,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185876759] [2021-08-21 12:15:38,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:38,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:38,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:38,656 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 12:15:38,682 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 12:15:39,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:39,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:39,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:39,153 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 35 treesize of output 31 [2021-08-21 12:15:39,267 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:39,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:39,273 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:39,274 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 24 treesize of output 23 [2021-08-21 12:15:39,359 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 12:15:39,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185876759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:39,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:39,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:39,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80208735] [2021-08-21 12:15:39,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:39,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:39,360 INFO L87 Difference]: Start difference. First operand 263 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:39,621 INFO L93 Difference]: Finished difference Result 374 states and 1101 transitions. [2021-08-21 12:15:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:39,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:39,623 INFO L225 Difference]: With dead ends: 374 [2021-08-21 12:15:39,623 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 12:15:39,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 12:15:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 261. [2021-08-21 12:15:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.003846153846154) internal successors, (781), 260 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 781 transitions. [2021-08-21 12:15:39,627 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 781 transitions. Word has length 20 [2021-08-21 12:15:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:39,627 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 781 transitions. [2021-08-21 12:15:39,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 781 transitions. [2021-08-21 12:15:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:39,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:39,628 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:39,661 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 12:15:39,828 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,SelfDestructingSolverStorable32 [2021-08-21 12:15:39,829 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash 167538969, now seen corresponding path program 22 times [2021-08-21 12:15:39,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:39,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660489420] [2021-08-21 12:15:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:39,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:40,029 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 12:15:40,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:40,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660489420] [2021-08-21 12:15:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660489420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:40,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130019559] [2021-08-21 12:15:40,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:40,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:40,030 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 12:15:40,031 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 12:15:40,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:40,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:40,529 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 35 treesize of output 31 [2021-08-21 12:15:40,573 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:15:40,580 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:40,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:15:40,696 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 12:15:40,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130019559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:40,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:40,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:40,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334736291] [2021-08-21 12:15:40,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:40,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:40,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:40,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:40,697 INFO L87 Difference]: Start difference. First operand 261 states and 781 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:40,936 INFO L93 Difference]: Finished difference Result 372 states and 1094 transitions. [2021-08-21 12:15:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:40,937 INFO L225 Difference]: With dead ends: 372 [2021-08-21 12:15:40,937 INFO L226 Difference]: Without dead ends: 357 [2021-08-21 12:15:40,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-21 12:15:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 260. [2021-08-21 12:15:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.996138996138996) internal successors, (776), 259 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-08-21 12:15:40,941 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 20 [2021-08-21 12:15:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:40,942 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-08-21 12:15:40,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-08-21 12:15:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:40,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:40,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:40,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 12:15:41,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:41,153 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1753971719, now seen corresponding path program 23 times [2021-08-21 12:15:41,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:41,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881530491] [2021-08-21 12:15:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:41,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:41,327 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 12:15:41,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:41,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881530491] [2021-08-21 12:15:41,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881530491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:41,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034645965] [2021-08-21 12:15:41,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:41,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:41,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:41,329 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 12:15:41,352 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 12:15:41,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:41,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:41,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:41,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:41,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:41,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 15 [2021-08-21 12:15:41,952 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 32 treesize of output 28 [2021-08-21 12:15:41,957 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:41,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:15:42,034 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 12:15:42,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034645965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:42,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:42,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:42,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558698983] [2021-08-21 12:15:42,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:42,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:42,036 INFO L87 Difference]: Start difference. First operand 260 states and 776 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:42,349 INFO L93 Difference]: Finished difference Result 385 states and 1130 transitions. [2021-08-21 12:15:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:15:42,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:42,351 INFO L225 Difference]: With dead ends: 385 [2021-08-21 12:15:42,351 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 12:15:42,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 12:15:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 263. [2021-08-21 12:15:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0076335877862594) internal successors, (788), 262 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 788 transitions. [2021-08-21 12:15:42,355 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 788 transitions. Word has length 20 [2021-08-21 12:15:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:42,355 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 788 transitions. [2021-08-21 12:15:42,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 788 transitions. [2021-08-21 12:15:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:42,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:42,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:42,374 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 12:15:42,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:42,573 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1944889661, now seen corresponding path program 24 times [2021-08-21 12:15:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:42,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449885843] [2021-08-21 12:15:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:42,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:42,764 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 12:15:42,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:42,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449885843] [2021-08-21 12:15:42,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449885843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:42,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672812376] [2021-08-21 12:15:42,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:42,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:42,765 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 12:15:42,767 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 12:15:43,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:15:43,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:43,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:43,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:43,326 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:43,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:43,375 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:43,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:15:43,382 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:43,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:15:43,504 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 12:15:43,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672812376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:43,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:43,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:43,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730739792] [2021-08-21 12:15:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:43,506 INFO L87 Difference]: Start difference. First operand 263 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:43,838 INFO L93 Difference]: Finished difference Result 379 states and 1115 transitions. [2021-08-21 12:15:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:15:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:43,840 INFO L225 Difference]: With dead ends: 379 [2021-08-21 12:15:43,840 INFO L226 Difference]: Without dead ends: 364 [2021-08-21 12:15:43,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-21 12:15:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 259. [2021-08-21 12:15:43,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.992248062015504) internal successors, (772), 258 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 772 transitions. [2021-08-21 12:15:43,846 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 772 transitions. Word has length 20 [2021-08-21 12:15:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:43,846 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 772 transitions. [2021-08-21 12:15:43,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 772 transitions. [2021-08-21 12:15:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:43,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:43,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:43,871 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 12:15:44,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:15:44,057 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1438661017, now seen corresponding path program 25 times [2021-08-21 12:15:44,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:44,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301602802] [2021-08-21 12:15:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:44,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:44,196 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 12:15:44,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:44,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301602802] [2021-08-21 12:15:44,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301602802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:44,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905378433] [2021-08-21 12:15:44,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:44,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:44,198 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 12:15:44,198 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 12:15:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:44,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:44,768 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 35 treesize of output 31 [2021-08-21 12:15:44,982 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:44,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:15:44,988 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:44,988 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 12:15:45,007 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 12:15:45,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905378433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:45,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:45,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:15:45,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202815724] [2021-08-21 12:15:45,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:15:45,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:15:45,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:45,015 INFO L87 Difference]: Start difference. First operand 259 states and 772 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 12:15:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:45,209 INFO L93 Difference]: Finished difference Result 323 states and 955 transitions. [2021-08-21 12:15:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:45,209 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 20 [2021-08-21 12:15:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:45,210 INFO L225 Difference]: With dead ends: 323 [2021-08-21 12:15:45,210 INFO L226 Difference]: Without dead ends: 308 [2021-08-21 12:15:45,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-08-21 12:15:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 269. [2021-08-21 12:15:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0111940298507465) internal successors, (807), 268 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 807 transitions. [2021-08-21 12:15:45,214 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 807 transitions. Word has length 20 [2021-08-21 12:15:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:45,214 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 807 transitions. [2021-08-21 12:15:45,215 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 12:15:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 807 transitions. [2021-08-21 12:15:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:45,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:45,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:45,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:45,416 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,SelfDestructingSolverStorable36 [2021-08-21 12:15:45,417 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash -147147505, now seen corresponding path program 26 times [2021-08-21 12:15:45,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:45,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870058862] [2021-08-21 12:15:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:45,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:45,600 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 12:15:45,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:45,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870058862] [2021-08-21 12:15:45,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870058862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:45,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031084189] [2021-08-21 12:15:45,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:45,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:45,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:45,602 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 12:15:45,603 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 12:15:46,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:46,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:46,199 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 35 treesize of output 31 [2021-08-21 12:15:46,380 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:46,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:15:46,395 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:46,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:15:46,449 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 12:15:46,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031084189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:46,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:46,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:15:46,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25102928] [2021-08-21 12:15:46,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:46,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:46,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:46,451 INFO L87 Difference]: Start difference. First operand 269 states and 807 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:15:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:46,599 INFO L93 Difference]: Finished difference Result 329 states and 968 transitions. [2021-08-21 12:15:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:46,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:46,600 INFO L225 Difference]: With dead ends: 329 [2021-08-21 12:15:46,600 INFO L226 Difference]: Without dead ends: 314 [2021-08-21 12:15:46,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-21 12:15:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 267. [2021-08-21 12:15:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.007518796992481) internal successors, (800), 266 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 800 transitions. [2021-08-21 12:15:46,604 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 800 transitions. Word has length 20 [2021-08-21 12:15:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:46,605 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 800 transitions. [2021-08-21 12:15:46,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:15:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 800 transitions. [2021-08-21 12:15:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:46,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:46,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:46,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:46,823 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,SelfDestructingSolverStorable37 [2021-08-21 12:15:46,823 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash -608693927, now seen corresponding path program 27 times [2021-08-21 12:15:46,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:46,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542684083] [2021-08-21 12:15:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:46,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:47,023 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 12:15:47,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:47,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542684083] [2021-08-21 12:15:47,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542684083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:47,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567033773] [2021-08-21 12:15:47,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:47,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:47,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:47,031 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 12:15:47,032 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 12:15:47,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:47,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:47,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:47,649 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 35 treesize of output 31 [2021-08-21 12:15:47,798 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:47,798 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-08-21 12:15:47,804 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:47,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:15:47,878 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 12:15:47,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567033773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:47,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:47,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:47,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974879213] [2021-08-21 12:15:47,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:47,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:47,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:47,879 INFO L87 Difference]: Start difference. First operand 267 states and 800 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:48,075 INFO L93 Difference]: Finished difference Result 363 states and 1068 transitions. [2021-08-21 12:15:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:48,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:48,077 INFO L225 Difference]: With dead ends: 363 [2021-08-21 12:15:48,077 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 12:15:48,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 12:15:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 264. [2021-08-21 12:15:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0) internal successors, (789), 263 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 789 transitions. [2021-08-21 12:15:48,082 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 789 transitions. Word has length 20 [2021-08-21 12:15:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:48,082 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 789 transitions. [2021-08-21 12:15:48,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 789 transitions. [2021-08-21 12:15:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:48,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:48,082 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:48,101 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 12:15:48,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:15:48,293 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2076939531, now seen corresponding path program 28 times [2021-08-21 12:15:48,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:48,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766573064] [2021-08-21 12:15:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:48,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:48,436 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 12:15:48,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:48,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766573064] [2021-08-21 12:15:48,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766573064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:48,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875748495] [2021-08-21 12:15:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:48,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:48,442 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 12:15:48,444 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 12:15:49,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:49,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:49,101 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 35 treesize of output 31 [2021-08-21 12:15:49,147 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:49,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:15:49,154 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:49,154 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 29 treesize of output 28 [2021-08-21 12:15:49,221 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 12:15:49,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875748495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:49,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:49,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:15:49,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065968432] [2021-08-21 12:15:49,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:15:49,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:15:49,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:49,222 INFO L87 Difference]: Start difference. First operand 264 states and 789 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:49,387 INFO L93 Difference]: Finished difference Result 345 states and 1014 transitions. [2021-08-21 12:15:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:49,389 INFO L225 Difference]: With dead ends: 345 [2021-08-21 12:15:49,389 INFO L226 Difference]: Without dead ends: 330 [2021-08-21 12:15:49,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-08-21 12:15:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 263. [2021-08-21 12:15:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.9923664122137406) internal successors, (784), 262 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 784 transitions. [2021-08-21 12:15:49,393 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 784 transitions. Word has length 20 [2021-08-21 12:15:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:49,393 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 784 transitions. [2021-08-21 12:15:49,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 784 transitions. [2021-08-21 12:15:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:49,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:49,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:49,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:49,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:15:49,609 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash 106457743, now seen corresponding path program 29 times [2021-08-21 12:15:49,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:49,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170082701] [2021-08-21 12:15:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:49,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:49,749 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 12:15:49,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:49,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170082701] [2021-08-21 12:15:49,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170082701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:49,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704724787] [2021-08-21 12:15:49,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:49,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:49,750 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 12:15:49,751 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 12:15:50,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:15:50,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:50,539 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:50,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-08-21 12:15:50,582 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:50,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:15:50,588 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:50,589 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-08-21 12:15:50,628 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 12:15:50,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704724787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:50,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:50,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:15:50,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225187707] [2021-08-21 12:15:50,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:50,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:50,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:50,629 INFO L87 Difference]: Start difference. First operand 263 states and 784 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:50,778 INFO L93 Difference]: Finished difference Result 324 states and 957 transitions. [2021-08-21 12:15:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:15:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:50,779 INFO L225 Difference]: With dead ends: 324 [2021-08-21 12:15:50,779 INFO L226 Difference]: Without dead ends: 309 [2021-08-21 12:15:50,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-21 12:15:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 260. [2021-08-21 12:15:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.996138996138996) internal successors, (776), 259 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-08-21 12:15:50,783 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 20 [2021-08-21 12:15:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:50,783 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-08-21 12:15:50,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-08-21 12:15:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:50,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:50,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:50,802 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 12:15:50,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:50,993 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash -528084861, now seen corresponding path program 30 times [2021-08-21 12:15:50,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:50,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744707902] [2021-08-21 12:15:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:50,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:51,157 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 12:15:51,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:51,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744707902] [2021-08-21 12:15:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744707902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:51,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599752867] [2021-08-21 12:15:51,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:51,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:51,159 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 12:15:51,160 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 12:15:51,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:15:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:51,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:51,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:15:51,850 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 19 treesize of output 15 [2021-08-21 12:15:51,889 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:51,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 treesize of output 35 [2021-08-21 12:15:52,006 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 12:15:52,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599752867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:52,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:52,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:52,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878647408] [2021-08-21 12:15:52,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:52,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:52,007 INFO L87 Difference]: Start difference. First operand 260 states and 776 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:52,212 INFO L93 Difference]: Finished difference Result 378 states and 1108 transitions. [2021-08-21 12:15:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:52,214 INFO L225 Difference]: With dead ends: 378 [2021-08-21 12:15:52,214 INFO L226 Difference]: Without dead ends: 363 [2021-08-21 12:15:52,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-21 12:15:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 259. [2021-08-21 12:15:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.992248062015504) internal successors, (772), 258 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 772 transitions. [2021-08-21 12:15:52,219 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 772 transitions. Word has length 20 [2021-08-21 12:15:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:52,219 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 772 transitions. [2021-08-21 12:15:52,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 772 transitions. [2021-08-21 12:15:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:52,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:52,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:52,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:52,428 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,SelfDestructingSolverStorable41 [2021-08-21 12:15:52,428 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1692373105, now seen corresponding path program 31 times [2021-08-21 12:15:52,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:52,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859919381] [2021-08-21 12:15:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:52,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:52,586 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 12:15:52,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:52,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859919381] [2021-08-21 12:15:52,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859919381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:52,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349067336] [2021-08-21 12:15:52,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:52,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:52,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:52,588 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 12:15:52,588 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 12:15:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:53,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:53,325 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:53,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:15:53,460 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:15:53,467 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:53,467 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 24 treesize of output 23 [2021-08-21 12:15:53,546 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 12:15:53,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349067336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:53,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:53,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:53,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824883864] [2021-08-21 12:15:53,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:53,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:53,547 INFO L87 Difference]: Start difference. First operand 259 states and 772 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:53,788 INFO L93 Difference]: Finished difference Result 347 states and 1026 transitions. [2021-08-21 12:15:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:53,789 INFO L225 Difference]: With dead ends: 347 [2021-08-21 12:15:53,790 INFO L226 Difference]: Without dead ends: 332 [2021-08-21 12:15:53,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-08-21 12:15:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 265. [2021-08-21 12:15:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.003787878787879) internal successors, (793), 264 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 793 transitions. [2021-08-21 12:15:53,794 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 793 transitions. Word has length 20 [2021-08-21 12:15:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:53,794 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 793 transitions. [2021-08-21 12:15:53,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 793 transitions. [2021-08-21 12:15:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:53,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:53,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:53,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:53,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:53,995 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1096267189, now seen corresponding path program 32 times [2021-08-21 12:15:53,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:53,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918983555] [2021-08-21 12:15:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:53,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:54,156 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 12:15:54,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:54,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918983555] [2021-08-21 12:15:54,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918983555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:54,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832351897] [2021-08-21 12:15:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:54,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:54,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:54,157 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 12:15:54,158 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 12:15:54,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:54,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:54,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:54,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:54,897 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:54,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:15:54,949 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:54,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:15:54,955 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:54,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:15:55,073 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 12:15:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832351897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:55,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:55,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:55,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159857156] [2021-08-21 12:15:55,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:55,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:55,074 INFO L87 Difference]: Start difference. First operand 265 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:55,279 INFO L93 Difference]: Finished difference Result 359 states and 1056 transitions. [2021-08-21 12:15:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:55,281 INFO L225 Difference]: With dead ends: 359 [2021-08-21 12:15:55,281 INFO L226 Difference]: Without dead ends: 344 [2021-08-21 12:15:55,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-21 12:15:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 262. [2021-08-21 12:15:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-08-21 12:15:55,285 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-08-21 12:15:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:55,285 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-08-21 12:15:55,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-08-21 12:15:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:55,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:55,285 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:55,304 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 12:15:55,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:55,491 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1588862951, now seen corresponding path program 33 times [2021-08-21 12:15:55,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:55,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538918051] [2021-08-21 12:15:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:55,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:55,615 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 12:15:55,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:55,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538918051] [2021-08-21 12:15:55,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538918051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:55,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768917983] [2021-08-21 12:15:55,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:55,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:55,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:55,616 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 12:15:55,617 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 12:15:56,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:15:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:56,371 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:56,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:15:56,405 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:56,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:15:56,410 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:15:56,410 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 35 treesize of output 34 [2021-08-21 12:15:56,480 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 12:15:56,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768917983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:56,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:56,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:15:56,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672818728] [2021-08-21 12:15:56,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:15:56,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:15:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:15:56,481 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:56,596 INFO L93 Difference]: Finished difference Result 351 states and 1037 transitions. [2021-08-21 12:15:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:15:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:56,597 INFO L225 Difference]: With dead ends: 351 [2021-08-21 12:15:56,597 INFO L226 Difference]: Without dead ends: 336 [2021-08-21 12:15:56,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-08-21 12:15:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 262. [2021-08-21 12:15:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-08-21 12:15:56,601 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-08-21 12:15:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:56,601 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-08-21 12:15:56,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-08-21 12:15:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:56,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:56,602 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:56,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 12:15:56,821 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,SelfDestructingSolverStorable44 [2021-08-21 12:15:56,821 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1573806475, now seen corresponding path program 34 times [2021-08-21 12:15:56,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:56,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017593139] [2021-08-21 12:15:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:56,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:56,919 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 12:15:56,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:56,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017593139] [2021-08-21 12:15:56,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017593139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:56,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282545237] [2021-08-21 12:15:56,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:56,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:56,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:56,921 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 12:15:56,922 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 12:15:57,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:57,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:57,645 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 19 treesize of output 15 [2021-08-21 12:15:57,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:15:57,745 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 12:15:57,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282545237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:57,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:57,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:15:57,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748088193] [2021-08-21 12:15:57,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:15:57,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:57,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:15:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:57,746 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:58,146 INFO L93 Difference]: Finished difference Result 629 states and 1844 transitions. [2021-08-21 12:15:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:15:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:15:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:58,149 INFO L225 Difference]: With dead ends: 629 [2021-08-21 12:15:58,149 INFO L226 Difference]: Without dead ends: 614 [2021-08-21 12:15:58,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:15:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-08-21 12:15:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 276. [2021-08-21 12:15:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.981818181818182) internal successors, (820), 275 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 820 transitions. [2021-08-21 12:15:58,160 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 820 transitions. Word has length 20 [2021-08-21 12:15:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:58,160 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 820 transitions. [2021-08-21 12:15:58,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 820 transitions. [2021-08-21 12:15:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:58,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:58,160 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:58,179 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 12:15:58,374 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,SelfDestructingSolverStorable45 [2021-08-21 12:15:58,374 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:58,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1714766737, now seen corresponding path program 35 times [2021-08-21 12:15:58,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:58,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518233399] [2021-08-21 12:15:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:58,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:58,507 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 12:15:58,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:58,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518233399] [2021-08-21 12:15:58,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518233399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:58,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865826662] [2021-08-21 12:15:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:58,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:58,508 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 12:15:58,509 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 12:15:59,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:59,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:15:59,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:59,265 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 19 treesize of output 15 [2021-08-21 12:15:59,319 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 21 treesize of output 17 [2021-08-21 12:15:59,352 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 12:15:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865826662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:59,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:59,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:15:59,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765063462] [2021-08-21 12:15:59,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:15:59,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:15:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:59,353 INFO L87 Difference]: Start difference. First operand 276 states and 820 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 12:15:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:59,736 INFO L93 Difference]: Finished difference Result 547 states and 1608 transitions. [2021-08-21 12:15:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:15:59,737 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 20 [2021-08-21 12:15:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:59,739 INFO L225 Difference]: With dead ends: 547 [2021-08-21 12:15:59,739 INFO L226 Difference]: Without dead ends: 532 [2021-08-21 12:15:59,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:15:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-21 12:15:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 284. [2021-08-21 12:15:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.9964664310954063) internal successors, (848), 283 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 848 transitions. [2021-08-21 12:15:59,743 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 848 transitions. Word has length 20 [2021-08-21 12:15:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:59,744 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 848 transitions. [2021-08-21 12:15:59,744 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 12:15:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 848 transitions. [2021-08-21 12:15:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:15:59,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:59,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:59,763 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 12:15:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:15:59,957 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash -500906731, now seen corresponding path program 36 times [2021-08-21 12:15:59,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:59,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845702201] [2021-08-21 12:15:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:59,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:00,084 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 12:16:00,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:00,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845702201] [2021-08-21 12:16:00,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845702201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:00,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426587675] [2021-08-21 12:16:00,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:00,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:00,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:00,086 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 12:16:00,087 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 12:16:00,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:16:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:00,871 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 19 treesize of output 15 [2021-08-21 12:16:00,889 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 21 treesize of output 17 [2021-08-21 12:16:00,949 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 12:16:00,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426587675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:00,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:00,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:00,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143536832] [2021-08-21 12:16:00,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:00,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:00,950 INFO L87 Difference]: Start difference. First operand 284 states and 848 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 12:16:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:01,360 INFO L93 Difference]: Finished difference Result 559 states and 1638 transitions. [2021-08-21 12:16:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:16:01,360 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 20 [2021-08-21 12:16:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:01,362 INFO L225 Difference]: With dead ends: 559 [2021-08-21 12:16:01,362 INFO L226 Difference]: Without dead ends: 544 [2021-08-21 12:16:01,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-21 12:16:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 280. [2021-08-21 12:16:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.982078853046595) internal successors, (832), 279 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 832 transitions. [2021-08-21 12:16:01,367 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 832 transitions. Word has length 20 [2021-08-21 12:16:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:01,367 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 832 transitions. [2021-08-21 12:16:01,367 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 12:16:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 832 transitions. [2021-08-21 12:16:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:01,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:01,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:01,388 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 12:16:01,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:01,577 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1645264029, now seen corresponding path program 37 times [2021-08-21 12:16:01,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:01,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071916408] [2021-08-21 12:16:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:01,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:01,682 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 12:16:01,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:01,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071916408] [2021-08-21 12:16:01,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071916408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:01,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75342651] [2021-08-21 12:16:01,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:01,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:01,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:01,683 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 12:16:01,684 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 12:16:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:02,482 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 19 treesize of output 15 [2021-08-21 12:16:02,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:16:02,572 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 12:16:02,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75342651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:02,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:02,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:02,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101298097] [2021-08-21 12:16:02,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:02,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:02,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:02,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:02,575 INFO L87 Difference]: Start difference. First operand 280 states and 832 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 12:16:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:02,811 INFO L93 Difference]: Finished difference Result 512 states and 1504 transitions. [2021-08-21 12:16:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:02,811 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 20 [2021-08-21 12:16:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:02,812 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:16:02,812 INFO L226 Difference]: Without dead ends: 497 [2021-08-21 12:16:02,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:16:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-21 12:16:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 272. [2021-08-21 12:16:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.981549815498155) internal successors, (808), 271 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 808 transitions. [2021-08-21 12:16:02,817 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 808 transitions. Word has length 20 [2021-08-21 12:16:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:02,817 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 808 transitions. [2021-08-21 12:16:02,817 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 12:16:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 808 transitions. [2021-08-21 12:16:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:02,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:02,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:02,836 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 12:16:03,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:16:03,018 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:03,029 INFO L82 PathProgramCache]: Analyzing trace with hash 242725131, now seen corresponding path program 38 times [2021-08-21 12:16:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:03,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128692731] [2021-08-21 12:16:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:03,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:03,204 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 12:16:03,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:03,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128692731] [2021-08-21 12:16:03,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128692731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:03,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911449583] [2021-08-21 12:16:03,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:03,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:03,205 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 12:16:03,206 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 12:16:03,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:03,976 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 19 treesize of output 15 [2021-08-21 12:16:04,028 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 21 treesize of output 17 [2021-08-21 12:16:04,061 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 12:16:04,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911449583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:04,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:04,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:04,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801750243] [2021-08-21 12:16:04,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:04,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:04,062 INFO L87 Difference]: Start difference. First operand 272 states and 808 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 12:16:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:04,444 INFO L93 Difference]: Finished difference Result 550 states and 1619 transitions. [2021-08-21 12:16:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:16:04,444 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 20 [2021-08-21 12:16:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:04,445 INFO L225 Difference]: With dead ends: 550 [2021-08-21 12:16:04,445 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 12:16:04,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 12:16:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 287. [2021-08-21 12:16:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9965034965034967) internal successors, (857), 286 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 857 transitions. [2021-08-21 12:16:04,451 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 857 transitions. Word has length 20 [2021-08-21 12:16:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:04,451 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 857 transitions. [2021-08-21 12:16:04,451 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 12:16:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 857 transitions. [2021-08-21 12:16:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:04,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:04,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:04,472 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 12:16:04,664 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,SelfDestructingSolverStorable49 [2021-08-21 12:16:04,665 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:04,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1972948337, now seen corresponding path program 39 times [2021-08-21 12:16:04,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:04,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257676223] [2021-08-21 12:16:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:04,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:04,786 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 12:16:04,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:04,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257676223] [2021-08-21 12:16:04,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257676223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:04,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093216342] [2021-08-21 12:16:04,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:04,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:04,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:04,787 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 12:16:04,788 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 12:16:05,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:16:05,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:05,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:05,596 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 19 treesize of output 15 [2021-08-21 12:16:05,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:16:05,674 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 12:16:05,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093216342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:05,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:05,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:05,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960716041] [2021-08-21 12:16:05,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:05,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:05,675 INFO L87 Difference]: Start difference. First operand 287 states and 857 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 12:16:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:06,025 INFO L93 Difference]: Finished difference Result 562 states and 1649 transitions. [2021-08-21 12:16:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:16:06,026 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 20 [2021-08-21 12:16:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:06,027 INFO L225 Difference]: With dead ends: 562 [2021-08-21 12:16:06,027 INFO L226 Difference]: Without dead ends: 547 [2021-08-21 12:16:06,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-08-21 12:16:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 283. [2021-08-21 12:16:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.982269503546099) internal successors, (841), 282 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 841 transitions. [2021-08-21 12:16:06,032 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 841 transitions. Word has length 20 [2021-08-21 12:16:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:06,032 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 841 transitions. [2021-08-21 12:16:06,032 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 12:16:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 841 transitions. [2021-08-21 12:16:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:06,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:06,032 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:06,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:06,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:06,242 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:06,242 INFO L82 PathProgramCache]: Analyzing trace with hash 173222423, now seen corresponding path program 40 times [2021-08-21 12:16:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:06,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712256219] [2021-08-21 12:16:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:06,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:06,326 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 12:16:06,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:06,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712256219] [2021-08-21 12:16:06,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712256219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:06,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077654646] [2021-08-21 12:16:06,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:06,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:06,331 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 12:16:06,333 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 12:16:07,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:07,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:07,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:07,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:07,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:16:07,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:16:07,236 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 12:16:07,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077654646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:07,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:07,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:07,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331929370] [2021-08-21 12:16:07,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:07,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:07,238 INFO L87 Difference]: Start difference. First operand 283 states and 841 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 12:16:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:07,442 INFO L93 Difference]: Finished difference Result 538 states and 1583 transitions. [2021-08-21 12:16:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:07,442 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 20 [2021-08-21 12:16:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:07,443 INFO L225 Difference]: With dead ends: 538 [2021-08-21 12:16:07,443 INFO L226 Difference]: Without dead ends: 523 [2021-08-21 12:16:07,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-21 12:16:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 279. [2021-08-21 12:16:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.9820143884892087) internal successors, (829), 278 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 829 transitions. [2021-08-21 12:16:07,448 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 829 transitions. Word has length 20 [2021-08-21 12:16:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:07,448 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 829 transitions. [2021-08-21 12:16:07,448 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 12:16:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 829 transitions. [2021-08-21 12:16:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:07,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:07,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:07,489 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 12:16:07,682 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,SelfDestructingSolverStorable51 [2021-08-21 12:16:07,682 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash -920869165, now seen corresponding path program 41 times [2021-08-21 12:16:07,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:07,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010561089] [2021-08-21 12:16:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:07,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:07,783 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 12:16:07,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:07,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010561089] [2021-08-21 12:16:07,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010561089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:07,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789722284] [2021-08-21 12:16:07,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:07,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:07,784 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 12:16:07,785 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 12:16:08,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:16:08,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:08,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:16:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:08,644 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 19 treesize of output 15 [2021-08-21 12:16:08,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:16:08,826 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 12:16:08,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789722284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:08,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:08,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:08,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452763136] [2021-08-21 12:16:08,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:08,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:08,827 INFO L87 Difference]: Start difference. First operand 279 states and 829 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 12:16:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:09,243 INFO L93 Difference]: Finished difference Result 659 states and 1951 transitions. [2021-08-21 12:16:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:16:09,243 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 20 [2021-08-21 12:16:09,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:09,245 INFO L225 Difference]: With dead ends: 659 [2021-08-21 12:16:09,245 INFO L226 Difference]: Without dead ends: 644 [2021-08-21 12:16:09,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-08-21 12:16:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 301. [2021-08-21 12:16:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.98) internal successors, (894), 300 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 894 transitions. [2021-08-21 12:16:09,250 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 894 transitions. Word has length 20 [2021-08-21 12:16:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:09,250 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 894 transitions. [2021-08-21 12:16:09,250 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 12:16:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 894 transitions. [2021-08-21 12:16:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:09,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:09,251 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:09,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:09,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:09,470 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:09,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2007222891, now seen corresponding path program 42 times [2021-08-21 12:16:09,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:09,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836994181] [2021-08-21 12:16:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:09,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:09,612 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 12:16:09,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:09,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836994181] [2021-08-21 12:16:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836994181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:09,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410137370] [2021-08-21 12:16:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:09,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:09,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:09,629 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 12:16:09,677 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 12:16:10,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:16:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:10,609 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:10,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:10,739 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:10,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:16:10,744 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:10,746 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 24 treesize of output 23 [2021-08-21 12:16:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:10,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410137370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:10,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:10,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:10,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320987368] [2021-08-21 12:16:10,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:10,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:10,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:10,780 INFO L87 Difference]: Start difference. First operand 301 states and 894 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:11,089 INFO L93 Difference]: Finished difference Result 437 states and 1290 transitions. [2021-08-21 12:16:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:11,090 INFO L225 Difference]: With dead ends: 437 [2021-08-21 12:16:11,090 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 12:16:11,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 12:16:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 309. [2021-08-21 12:16:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9837662337662336) internal successors, (919), 308 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 919 transitions. [2021-08-21 12:16:11,094 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 919 transitions. Word has length 20 [2021-08-21 12:16:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:11,095 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 919 transitions. [2021-08-21 12:16:11,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 919 transitions. [2021-08-21 12:16:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:11,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:11,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:11,125 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 12:16:11,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:11,317 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:11,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:11,317 INFO L82 PathProgramCache]: Analyzing trace with hash 421414369, now seen corresponding path program 43 times [2021-08-21 12:16:11,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:11,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394791127] [2021-08-21 12:16:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:11,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:11,464 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 12:16:11,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:11,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394791127] [2021-08-21 12:16:11,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394791127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:11,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067573854] [2021-08-21 12:16:11,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:11,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:11,466 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 12:16:11,467 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 12:16:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:12,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:12,453 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:12,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:12,519 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:12,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:16:12,526 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:12,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:16:12,601 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 12:16:12,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067573854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:12,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:12,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:12,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557448679] [2021-08-21 12:16:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:12,602 INFO L87 Difference]: Start difference. First operand 309 states and 919 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:16:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:12,799 INFO L93 Difference]: Finished difference Result 373 states and 1096 transitions. [2021-08-21 12:16:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:12,800 INFO L225 Difference]: With dead ends: 373 [2021-08-21 12:16:12,800 INFO L226 Difference]: Without dead ends: 358 [2021-08-21 12:16:12,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-21 12:16:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 307. [2021-08-21 12:16:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.980392156862745) internal successors, (912), 306 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 912 transitions. [2021-08-21 12:16:12,804 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 912 transitions. Word has length 20 [2021-08-21 12:16:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:12,804 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 912 transitions. [2021-08-21 12:16:12,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:16:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 912 transitions. [2021-08-21 12:16:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:12,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:12,804 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:12,826 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 12:16:13,005 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,SelfDestructingSolverStorable54 [2021-08-21 12:16:13,006 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1009159691, now seen corresponding path program 44 times [2021-08-21 12:16:13,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:13,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146020697] [2021-08-21 12:16:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:13,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:13,215 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 12:16:13,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:13,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146020697] [2021-08-21 12:16:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146020697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:13,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949320143] [2021-08-21 12:16:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:13,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:13,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:13,216 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 12:16:13,218 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 12:16:14,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:14,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:14,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:14,221 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:14,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:14,283 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:14,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:16:14,300 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:14,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:16:14,385 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 12:16:14,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949320143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:14,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:14,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:14,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407212749] [2021-08-21 12:16:14,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:14,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:14,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:14,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:14,386 INFO L87 Difference]: Start difference. First operand 307 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:14,617 INFO L93 Difference]: Finished difference Result 450 states and 1327 transitions. [2021-08-21 12:16:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:14,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:14,619 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:16:14,619 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:16:14,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:16:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 305. [2021-08-21 12:16:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-08-21 12:16:14,623 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-08-21 12:16:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:14,623 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-08-21 12:16:14,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-08-21 12:16:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:14,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:14,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:14,645 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 12:16:14,836 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,SelfDestructingSolverStorable55 [2021-08-21 12:16:14,837 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash -988330193, now seen corresponding path program 45 times [2021-08-21 12:16:14,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:14,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680466224] [2021-08-21 12:16:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:14,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:14,970 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 12:16:14,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:14,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680466224] [2021-08-21 12:16:14,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680466224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:14,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373213412] [2021-08-21 12:16:14,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:14,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:14,993 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 12:16:14,993 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 12:16:15,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:16:15,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:15,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:16,003 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:16,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:16,184 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:16,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:16:16,189 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:16,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:16:16,206 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 12:16:16,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373213412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:16,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:16,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:16:16,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053076476] [2021-08-21 12:16:16,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:16,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:16,207 INFO L87 Difference]: Start difference. First operand 305 states and 907 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 12:16:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:16,329 INFO L93 Difference]: Finished difference Result 387 states and 1133 transitions. [2021-08-21 12:16:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:16,329 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 20 [2021-08-21 12:16:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:16,330 INFO L225 Difference]: With dead ends: 387 [2021-08-21 12:16:16,330 INFO L226 Difference]: Without dead ends: 372 [2021-08-21 12:16:16,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-08-21 12:16:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 311. [2021-08-21 12:16:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-08-21 12:16:16,334 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-08-21 12:16:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:16,335 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-08-21 12:16:16,335 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 12:16:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-08-21 12:16:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:16,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:16,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:16,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 12:16:16,555 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,SelfDestructingSolverStorable56 [2021-08-21 12:16:16,556 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:16,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1720828581, now seen corresponding path program 46 times [2021-08-21 12:16:16,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:16,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110236386] [2021-08-21 12:16:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:16,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:16,721 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 12:16:16,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:16,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110236386] [2021-08-21 12:16:16,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110236386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:16,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994779583] [2021-08-21 12:16:16,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:16,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:16,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:16,723 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 12:16:16,725 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 12:16:17,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:17,765 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:17,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:17,881 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:17,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:16:17,889 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:17,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:16:17,970 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 12:16:17,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994779583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:17,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:17,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:17,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641769888] [2021-08-21 12:16:17,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:17,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:17,972 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:18,229 INFO L93 Difference]: Finished difference Result 451 states and 1327 transitions. [2021-08-21 12:16:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:18,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:18,230 INFO L225 Difference]: With dead ends: 451 [2021-08-21 12:16:18,230 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:16:18,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:16:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 309. [2021-08-21 12:16:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9967532467532467) internal successors, (923), 308 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 923 transitions. [2021-08-21 12:16:18,235 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 923 transitions. Word has length 20 [2021-08-21 12:16:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:18,235 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 923 transitions. [2021-08-21 12:16:18,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 923 transitions. [2021-08-21 12:16:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:18,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:18,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:18,258 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 12:16:18,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:18,449 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:18,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1259282159, now seen corresponding path program 47 times [2021-08-21 12:16:18,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:18,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710713136] [2021-08-21 12:16:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:18,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:18,625 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 12:16:18,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:18,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710713136] [2021-08-21 12:16:18,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710713136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:18,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895664762] [2021-08-21 12:16:18,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:18,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:18,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:18,627 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 12:16:18,628 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 12:16:19,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:16:19,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:19,696 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:19,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:19,890 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:19,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:16:19,896 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:16:19,967 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 12:16:19,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895664762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:19,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:19,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:19,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82624374] [2021-08-21 12:16:19,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:19,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:19,968 INFO L87 Difference]: Start difference. First operand 309 states and 923 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:20,246 INFO L93 Difference]: Finished difference Result 449 states and 1320 transitions. [2021-08-21 12:16:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:20,248 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:16:20,248 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 12:16:20,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 12:16:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 306. [2021-08-21 12:16:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-08-21 12:16:20,252 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-08-21 12:16:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:20,252 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-08-21 12:16:20,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-08-21 12:16:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:20,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:20,253 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:20,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:20,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 12:16:20,465 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash -350051679, now seen corresponding path program 48 times [2021-08-21 12:16:20,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:20,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865391983] [2021-08-21 12:16:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:20,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:20,602 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 12:16:20,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:20,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865391983] [2021-08-21 12:16:20,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865391983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:20,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508953835] [2021-08-21 12:16:20,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:20,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:20,604 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 12:16:20,605 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 12:16:21,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:16:21,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:21,644 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:21,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:21,678 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:21,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:16:21,704 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:21,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:16:21,791 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 12:16:21,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508953835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:21,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:21,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:21,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464767245] [2021-08-21 12:16:21,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:21,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:21,792 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:21,981 INFO L93 Difference]: Finished difference Result 459 states and 1349 transitions. [2021-08-21 12:16:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:21,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:21,984 INFO L225 Difference]: With dead ends: 459 [2021-08-21 12:16:21,984 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 12:16:21,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:21,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 12:16:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 305. [2021-08-21 12:16:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-08-21 12:16:21,988 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-08-21 12:16:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:21,988 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-08-21 12:16:21,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-08-21 12:16:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:21,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:21,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:22,008 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 12:16:22,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:16:22,208 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:22,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1236381071, now seen corresponding path program 49 times [2021-08-21 12:16:22,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:22,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197500444] [2021-08-21 12:16:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:22,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:22,406 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 12:16:22,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:22,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197500444] [2021-08-21 12:16:22,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197500444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:22,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822569280] [2021-08-21 12:16:22,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:22,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:22,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:22,407 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 12:16:22,409 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 12:16:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:23,455 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:23,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:23,524 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:23,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:16:23,528 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:23,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:16:23,578 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 12:16:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822569280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:23,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:23,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:23,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525046722] [2021-08-21 12:16:23,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:23,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:23,579 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:23,833 INFO L93 Difference]: Finished difference Result 468 states and 1372 transitions. [2021-08-21 12:16:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:23,834 INFO L225 Difference]: With dead ends: 468 [2021-08-21 12:16:23,834 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:16:23,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:16:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 308. [2021-08-21 12:16:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.993485342019544) internal successors, (919), 307 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 919 transitions. [2021-08-21 12:16:23,839 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 919 transitions. Word has length 20 [2021-08-21 12:16:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:23,839 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 919 transitions. [2021-08-21 12:16:23,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 919 transitions. [2021-08-21 12:16:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:23,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:23,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:23,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:24,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:24,060 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1832486987, now seen corresponding path program 50 times [2021-08-21 12:16:24,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:24,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123865586] [2021-08-21 12:16:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:24,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:24,232 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 12:16:24,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:24,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123865586] [2021-08-21 12:16:24,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123865586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:24,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083343137] [2021-08-21 12:16:24,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:24,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:24,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:24,233 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 12:16:24,234 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 12:16:25,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:25,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:25,350 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:25,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:25,390 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:25,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:16:25,396 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:25,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:16:25,504 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 12:16:25,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083343137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:25,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:25,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:25,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382031853] [2021-08-21 12:16:25,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:25,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:25,505 INFO L87 Difference]: Start difference. First operand 308 states and 919 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:25,800 INFO L93 Difference]: Finished difference Result 462 states and 1357 transitions. [2021-08-21 12:16:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:25,801 INFO L225 Difference]: With dead ends: 462 [2021-08-21 12:16:25,801 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 12:16:25,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 12:16:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 304. [2021-08-21 12:16:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.98019801980198) internal successors, (903), 303 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 903 transitions. [2021-08-21 12:16:25,806 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 903 transitions. Word has length 20 [2021-08-21 12:16:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 903 transitions. [2021-08-21 12:16:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 903 transitions. [2021-08-21 12:16:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:25,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:25,806 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:25,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:26,020 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,SelfDestructingSolverStorable61 [2021-08-21 12:16:26,021 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash 921070369, now seen corresponding path program 51 times [2021-08-21 12:16:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:26,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405940810] [2021-08-21 12:16:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:26,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:26,149 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 12:16:26,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:26,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405940810] [2021-08-21 12:16:26,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405940810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:26,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639866972] [2021-08-21 12:16:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:26,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:26,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:26,150 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 12:16:26,151 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 12:16:27,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:16:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:27,281 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:27,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:27,450 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:27,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 34 [2021-08-21 12:16:27,456 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:27,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:16:27,498 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 12:16:27,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639866972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:27,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:27,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:27,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699606137] [2021-08-21 12:16:27,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:27,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:27,499 INFO L87 Difference]: Start difference. First operand 304 states and 903 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:27,789 INFO L93 Difference]: Finished difference Result 421 states and 1243 transitions. [2021-08-21 12:16:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:27,791 INFO L225 Difference]: With dead ends: 421 [2021-08-21 12:16:27,791 INFO L226 Difference]: Without dead ends: 406 [2021-08-21 12:16:27,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-21 12:16:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 314. [2021-08-21 12:16:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9968051118210863) internal successors, (938), 313 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 938 transitions. [2021-08-21 12:16:27,795 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 938 transitions. Word has length 20 [2021-08-21 12:16:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:27,795 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 938 transitions. [2021-08-21 12:16:27,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 938 transitions. [2021-08-21 12:16:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:27,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:27,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:27,815 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 12:16:28,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:28,001 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:28,001 INFO L82 PathProgramCache]: Analyzing trace with hash -664738153, now seen corresponding path program 52 times [2021-08-21 12:16:28,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:28,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615576601] [2021-08-21 12:16:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:28,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:28,172 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 12:16:28,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:28,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615576601] [2021-08-21 12:16:28,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615576601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:28,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261663984] [2021-08-21 12:16:28,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:28,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:28,173 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 12:16:28,174 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 12:16:29,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:29,361 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:29,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:29,457 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:29,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:16:29,463 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:29,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:16:29,545 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 12:16:29,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261663984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:29,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:29,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:29,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217509592] [2021-08-21 12:16:29,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:29,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:29,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:29,548 INFO L87 Difference]: Start difference. First operand 314 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:29,825 INFO L93 Difference]: Finished difference Result 427 states and 1256 transitions. [2021-08-21 12:16:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:29,826 INFO L225 Difference]: With dead ends: 427 [2021-08-21 12:16:29,826 INFO L226 Difference]: Without dead ends: 412 [2021-08-21 12:16:29,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:29,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-21 12:16:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 312. [2021-08-21 12:16:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9935691318327975) internal successors, (931), 311 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-08-21 12:16:29,830 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-08-21 12:16:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:29,830 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-08-21 12:16:29,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-08-21 12:16:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:29,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:29,831 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:29,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:30,032 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,SelfDestructingSolverStorable63 [2021-08-21 12:16:30,032 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1126284575, now seen corresponding path program 53 times [2021-08-21 12:16:30,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:30,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987546996] [2021-08-21 12:16:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:30,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:30,172 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 12:16:30,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:30,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987546996] [2021-08-21 12:16:30,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987546996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:30,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827433476] [2021-08-21 12:16:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:30,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:30,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:30,173 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 12:16:30,174 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 12:16:31,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:31,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:31,325 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:31,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:31,464 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:31,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 34 [2021-08-21 12:16:31,471 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:31,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:16:31,505 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 12:16:31,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827433476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:31,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:31,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:31,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554254655] [2021-08-21 12:16:31,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:31,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:31,506 INFO L87 Difference]: Start difference. First operand 312 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:31,660 INFO L93 Difference]: Finished difference Result 380 states and 1116 transitions. [2021-08-21 12:16:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:31,661 INFO L225 Difference]: With dead ends: 380 [2021-08-21 12:16:31,661 INFO L226 Difference]: Without dead ends: 365 [2021-08-21 12:16:31,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-21 12:16:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 309. [2021-08-21 12:16:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.987012987012987) internal successors, (920), 308 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 920 transitions. [2021-08-21 12:16:31,665 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 920 transitions. Word has length 20 [2021-08-21 12:16:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:31,665 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 920 transitions. [2021-08-21 12:16:31,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 920 transitions. [2021-08-21 12:16:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:31,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:31,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:31,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:31,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:31,885 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1559348883, now seen corresponding path program 54 times [2021-08-21 12:16:31,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:31,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841884573] [2021-08-21 12:16:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:31,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:32,077 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 12:16:32,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:32,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841884573] [2021-08-21 12:16:32,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841884573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:32,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933494540] [2021-08-21 12:16:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:32,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:32,079 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 12:16:32,080 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 12:16:33,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:16:33,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:33,290 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:33,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:16:33,335 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:33,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:16:33,341 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:33,341 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 29 treesize of output 28 [2021-08-21 12:16:33,460 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 12:16:33,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933494540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:33,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:33,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:33,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343490534] [2021-08-21 12:16:33,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:33,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:33,461 INFO L87 Difference]: Start difference. First operand 309 states and 920 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:33,718 INFO L93 Difference]: Finished difference Result 443 states and 1302 transitions. [2021-08-21 12:16:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:33,719 INFO L225 Difference]: With dead ends: 443 [2021-08-21 12:16:33,719 INFO L226 Difference]: Without dead ends: 428 [2021-08-21 12:16:33,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-21 12:16:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 308. [2021-08-21 12:16:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.980456026058632) internal successors, (915), 307 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 915 transitions. [2021-08-21 12:16:33,724 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 915 transitions. Word has length 20 [2021-08-21 12:16:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:33,724 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 915 transitions. [2021-08-21 12:16:33,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 915 transitions. [2021-08-21 12:16:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:33,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:33,724 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:33,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:33,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:33,933 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash -411132905, now seen corresponding path program 55 times [2021-08-21 12:16:33,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:33,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844876195] [2021-08-21 12:16:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:33,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:34,104 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 12:16:34,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:34,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844876195] [2021-08-21 12:16:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844876195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:34,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155276933] [2021-08-21 12:16:34,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:34,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:34,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:34,105 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 12:16:34,106 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 12:16:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:35,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:35,441 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:35,441 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 33 treesize of output 32 [2021-08-21 12:16:35,501 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:35,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:16:35,507 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:35,507 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 22 treesize of output 21 [2021-08-21 12:16:35,543 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 12:16:35,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155276933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:35,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:35,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:16:35,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841917958] [2021-08-21 12:16:35,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:35,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:35,544 INFO L87 Difference]: Start difference. First operand 308 states and 915 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:35,720 INFO L93 Difference]: Finished difference Result 369 states and 1088 transitions. [2021-08-21 12:16:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:35,721 INFO L225 Difference]: With dead ends: 369 [2021-08-21 12:16:35,721 INFO L226 Difference]: Without dead ends: 354 [2021-08-21 12:16:35,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-21 12:16:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 305. [2021-08-21 12:16:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-08-21 12:16:35,725 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-08-21 12:16:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:35,725 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-08-21 12:16:35,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-08-21 12:16:35,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:35,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:35,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:35,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:35,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:35,945 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1045675509, now seen corresponding path program 56 times [2021-08-21 12:16:35,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:35,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894571764] [2021-08-21 12:16:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:35,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:36,097 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 12:16:36,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:36,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894571764] [2021-08-21 12:16:36,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894571764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:36,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107043251] [2021-08-21 12:16:36,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:36,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:36,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:36,109 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 12:16:36,128 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 12:16:37,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:37,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:37,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:37,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:37,328 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 38 treesize of output 37 [2021-08-21 12:16:37,389 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:37,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 38 [2021-08-21 12:16:37,396 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:37,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:16:37,470 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 12:16:37,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107043251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:37,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:37,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:16:37,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884778226] [2021-08-21 12:16:37,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:16:37,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:16:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:37,471 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:37,632 INFO L93 Difference]: Finished difference Result 395 states and 1156 transitions. [2021-08-21 12:16:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:37,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:37,633 INFO L225 Difference]: With dead ends: 395 [2021-08-21 12:16:37,633 INFO L226 Difference]: Without dead ends: 380 [2021-08-21 12:16:37,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-21 12:16:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 304. [2021-08-21 12:16:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.98019801980198) internal successors, (903), 303 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 903 transitions. [2021-08-21 12:16:37,637 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 903 transitions. Word has length 20 [2021-08-21 12:16:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:37,637 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 903 transitions. [2021-08-21 12:16:37,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 903 transitions. [2021-08-21 12:16:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:37,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:37,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:37,659 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 12:16:37,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:37,857 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2085003543, now seen corresponding path program 57 times [2021-08-21 12:16:37,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:37,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781801225] [2021-08-21 12:16:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:37,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:38,022 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 12:16:38,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:38,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781801225] [2021-08-21 12:16:38,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781801225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:38,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027720384] [2021-08-21 12:16:38,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:38,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:38,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:38,023 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 12:16:38,025 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 12:16:39,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:16:39,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:39,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:39,259 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:39,259 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 38 treesize of output 37 [2021-08-21 12:16:39,368 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:39,368 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-08-21 12:16:39,374 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:39,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:16:39,457 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 12:16:39,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027720384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:39,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:39,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:39,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167220187] [2021-08-21 12:16:39,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:39,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:39,458 INFO L87 Difference]: Start difference. First operand 304 states and 903 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:39,733 INFO L93 Difference]: Finished difference Result 418 states and 1234 transitions. [2021-08-21 12:16:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:39,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:39,734 INFO L225 Difference]: With dead ends: 418 [2021-08-21 12:16:39,734 INFO L226 Difference]: Without dead ends: 403 [2021-08-21 12:16:39,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:16:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-21 12:16:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 310. [2021-08-21 12:16:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9902912621359223) internal successors, (924), 309 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 924 transitions. [2021-08-21 12:16:39,738 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 924 transitions. Word has length 20 [2021-08-21 12:16:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:39,738 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 924 transitions. [2021-08-21 12:16:39,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 924 transitions. [2021-08-21 12:16:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:39,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:39,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:39,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:39,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:16:39,949 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1613857837, now seen corresponding path program 58 times [2021-08-21 12:16:39,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:39,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403679593] [2021-08-21 12:16:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:39,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:40,112 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 12:16:40,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:40,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403679593] [2021-08-21 12:16:40,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403679593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:40,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196500993] [2021-08-21 12:16:40,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:40,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:40,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:40,115 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 12:16:40,115 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 12:16:41,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:41,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:41,415 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:16:41,468 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:41,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 44 [2021-08-21 12:16:41,474 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:16:41,593 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 12:16:41,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196500993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:41,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:41,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:41,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711016235] [2021-08-21 12:16:41,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:41,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:41,594 INFO L87 Difference]: Start difference. First operand 310 states and 924 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:41,796 INFO L93 Difference]: Finished difference Result 430 states and 1264 transitions. [2021-08-21 12:16:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:41,797 INFO L225 Difference]: With dead ends: 430 [2021-08-21 12:16:41,797 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:16:41,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:16:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:16:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 307. [2021-08-21 12:16:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.980392156862745) internal successors, (912), 306 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 912 transitions. [2021-08-21 12:16:41,802 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 912 transitions. Word has length 20 [2021-08-21 12:16:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:41,802 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 912 transitions. [2021-08-21 12:16:41,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 912 transitions. [2021-08-21 12:16:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:41,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:41,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:41,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:42,003 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,SelfDestructingSolverStorable69 [2021-08-21 12:16:42,003 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:42,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:42,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2106453599, now seen corresponding path program 59 times [2021-08-21 12:16:42,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:42,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243446361] [2021-08-21 12:16:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:42,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:42,182 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 12:16:42,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:42,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243446361] [2021-08-21 12:16:42,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243446361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:42,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893507795] [2021-08-21 12:16:42,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:42,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:42,183 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 12:16:42,184 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 12:16:43,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:16:43,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:43,492 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:43,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:16:43,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:43,564 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 44 treesize of output 43 [2021-08-21 12:16:43,571 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:16:43,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:16:43,690 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 12:16:43,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893507795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:43,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:43,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:16:43,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108793478] [2021-08-21 12:16:43,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:16:43,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:43,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:16:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:16:43,692 INFO L87 Difference]: Start difference. First operand 307 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:43,989 INFO L93 Difference]: Finished difference Result 418 states and 1233 transitions. [2021-08-21 12:16:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:16:43,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:43,991 INFO L225 Difference]: With dead ends: 418 [2021-08-21 12:16:43,991 INFO L226 Difference]: Without dead ends: 403 [2021-08-21 12:16:43,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:16:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-21 12:16:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 303. [2021-08-21 12:16:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.980132450331126) internal successors, (900), 302 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 900 transitions. [2021-08-21 12:16:43,995 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 900 transitions. Word has length 20 [2021-08-21 12:16:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:43,995 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 900 transitions. [2021-08-21 12:16:43,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 900 transitions. [2021-08-21 12:16:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:43,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:43,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:44,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:44,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:44,205 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:44,205 INFO L82 PathProgramCache]: Analyzing trace with hash -285800781, now seen corresponding path program 60 times [2021-08-21 12:16:44,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:44,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678714434] [2021-08-21 12:16:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:44,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:44,350 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 12:16:44,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:44,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678714434] [2021-08-21 12:16:44,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678714434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:44,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777604077] [2021-08-21 12:16:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:44,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:44,351 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 12:16:44,352 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 12:16:45,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:16:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:45,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:45,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:16:45,756 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 21 treesize of output 17 [2021-08-21 12:16:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:45,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777604077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:45,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:45,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:16:45,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915948176] [2021-08-21 12:16:45,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:45,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:45,799 INFO L87 Difference]: Start difference. First operand 303 states and 900 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:46,157 INFO L93 Difference]: Finished difference Result 473 states and 1398 transitions. [2021-08-21 12:16:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:46,158 INFO L225 Difference]: With dead ends: 473 [2021-08-21 12:16:46,158 INFO L226 Difference]: Without dead ends: 458 [2021-08-21 12:16:46,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-21 12:16:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 320. [2021-08-21 12:16:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9968652037617556) internal successors, (956), 319 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 956 transitions. [2021-08-21 12:16:46,163 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 956 transitions. Word has length 20 [2021-08-21 12:16:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:46,163 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 956 transitions. [2021-08-21 12:16:46,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 956 transitions. [2021-08-21 12:16:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:46,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:46,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:46,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:46,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:46,373 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1871609303, now seen corresponding path program 61 times [2021-08-21 12:16:46,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:46,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244671481] [2021-08-21 12:16:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:46,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:46,547 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 12:16:46,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:46,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244671481] [2021-08-21 12:16:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244671481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:46,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99109536] [2021-08-21 12:16:46,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:46,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:46,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:46,561 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 12:16:46,561 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 12:16:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:47,942 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 19 treesize of output 15 [2021-08-21 12:16:48,002 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 21 treesize of output 17 [2021-08-21 12:16:48,043 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 12:16:48,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99109536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:48,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:48,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:16:48,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090586415] [2021-08-21 12:16:48,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:16:48,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:16:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:48,044 INFO L87 Difference]: Start difference. First operand 320 states and 956 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:16:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:48,184 INFO L93 Difference]: Finished difference Result 412 states and 1213 transitions. [2021-08-21 12:16:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 20 [2021-08-21 12:16:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:48,185 INFO L225 Difference]: With dead ends: 412 [2021-08-21 12:16:48,185 INFO L226 Difference]: Without dead ends: 397 [2021-08-21 12:16:48,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-08-21 12:16:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 318. [2021-08-21 12:16:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.993690851735016) internal successors, (949), 317 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 949 transitions. [2021-08-21 12:16:48,189 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 949 transitions. Word has length 20 [2021-08-21 12:16:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:48,189 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 949 transitions. [2021-08-21 12:16:48,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:16:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 949 transitions. [2021-08-21 12:16:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:48,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:48,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:48,210 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 12:16:48,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:48,391 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1961811571, now seen corresponding path program 62 times [2021-08-21 12:16:48,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:48,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722574146] [2021-08-21 12:16:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:48,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:48,561 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 12:16:48,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722574146] [2021-08-21 12:16:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722574146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264343878] [2021-08-21 12:16:48,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:48,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:48,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:48,562 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 12:16:48,563 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 12:16:49,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:49,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:16:49,964 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 21 treesize of output 17 [2021-08-21 12:16:50,037 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 12:16:50,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264343878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:50,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:16:50,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854953769] [2021-08-21 12:16:50,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:50,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:50,038 INFO L87 Difference]: Start difference. First operand 318 states and 949 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:50,353 INFO L93 Difference]: Finished difference Result 485 states and 1428 transitions. [2021-08-21 12:16:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:50,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:50,355 INFO L225 Difference]: With dead ends: 485 [2021-08-21 12:16:50,355 INFO L226 Difference]: Without dead ends: 470 [2021-08-21 12:16:50,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-08-21 12:16:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 315. [2021-08-21 12:16:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9872611464968153) internal successors, (938), 314 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 938 transitions. [2021-08-21 12:16:50,359 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 938 transitions. Word has length 20 [2021-08-21 12:16:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:50,359 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 938 transitions. [2021-08-21 12:16:50,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 938 transitions. [2021-08-21 12:16:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:50,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:50,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:50,382 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 12:16:50,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:50,560 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash 352477733, now seen corresponding path program 63 times [2021-08-21 12:16:50,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:50,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316614611] [2021-08-21 12:16:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:50,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:50,723 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 12:16:50,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:50,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316614611] [2021-08-21 12:16:50,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316614611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:50,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644368152] [2021-08-21 12:16:50,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:50,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:50,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:50,741 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 12:16:50,792 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 12:16:52,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:16:52,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:52,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:52,130 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 19 treesize of output 15 [2021-08-21 12:16:52,155 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 21 treesize of output 17 [2021-08-21 12:16:52,244 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 12:16:52,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644368152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:52,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:52,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:16:52,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625688648] [2021-08-21 12:16:52,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:16:52,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:16:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:16:52,245 INFO L87 Difference]: Start difference. First operand 315 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:16:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:52,388 INFO L93 Difference]: Finished difference Result 428 states and 1259 transitions. [2021-08-21 12:16:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 20 [2021-08-21 12:16:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:52,389 INFO L225 Difference]: With dead ends: 428 [2021-08-21 12:16:52,389 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 12:16:52,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 12:16:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 314. [2021-08-21 12:16:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9808306709265175) internal successors, (933), 313 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 933 transitions. [2021-08-21 12:16:52,393 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 933 transitions. Word has length 20 [2021-08-21 12:16:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:52,393 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 933 transitions. [2021-08-21 12:16:52,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:16:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 933 transitions. [2021-08-21 12:16:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:52,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:52,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:52,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:52,604 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,SelfDestructingSolverStorable74 [2021-08-21 12:16:52,604 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1618004055, now seen corresponding path program 64 times [2021-08-21 12:16:52,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:52,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189440205] [2021-08-21 12:16:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:52,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:52,733 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 12:16:52,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:52,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189440205] [2021-08-21 12:16:52,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189440205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:52,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194723822] [2021-08-21 12:16:52,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:52,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:52,734 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 12:16:52,735 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 12:16:54,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:54,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:54,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:54,192 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 19 treesize of output 15 [2021-08-21 12:16:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:16:54,251 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 12:16:54,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194723822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:54,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:54,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:16:54,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438599569] [2021-08-21 12:16:54,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:16:54,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:16:54,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:54,253 INFO L87 Difference]: Start difference. First operand 314 states and 933 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 12:16:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:54,381 INFO L93 Difference]: Finished difference Result 407 states and 1202 transitions. [2021-08-21 12:16:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:16:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:54,382 INFO L225 Difference]: With dead ends: 407 [2021-08-21 12:16:54,382 INFO L226 Difference]: Without dead ends: 392 [2021-08-21 12:16:54,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-21 12:16:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 311. [2021-08-21 12:16:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9838709677419355) internal successors, (925), 310 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 925 transitions. [2021-08-21 12:16:54,387 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 925 transitions. Word has length 20 [2021-08-21 12:16:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:54,387 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 925 transitions. [2021-08-21 12:16:54,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 12:16:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 925 transitions. [2021-08-21 12:16:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:54,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:54,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:54,408 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 12:16:54,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:54,588 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2042420637, now seen corresponding path program 65 times [2021-08-21 12:16:54,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:54,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402497549] [2021-08-21 12:16:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:54,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:54,783 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 12:16:54,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:54,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402497549] [2021-08-21 12:16:54,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402497549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:54,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111156637] [2021-08-21 12:16:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:54,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:54,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:54,784 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 12:16:54,785 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 12:16:56,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:16:56,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:56,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:16:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:56,190 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 19 treesize of output 15 [2021-08-21 12:16:56,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:16:56,463 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 12:16:56,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111156637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:56,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:56,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:16:56,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038133634] [2021-08-21 12:16:56,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:56,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:56,464 INFO L87 Difference]: Start difference. First operand 311 states and 925 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:56,775 INFO L93 Difference]: Finished difference Result 497 states and 1472 transitions. [2021-08-21 12:16:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:16:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:56,776 INFO L225 Difference]: With dead ends: 497 [2021-08-21 12:16:56,776 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 12:16:56,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 12:16:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-08-21 12:16:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9805825242718447) internal successors, (921), 309 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 921 transitions. [2021-08-21 12:16:56,781 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 921 transitions. Word has length 20 [2021-08-21 12:16:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:56,781 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 921 transitions. [2021-08-21 12:16:56,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 921 transitions. [2021-08-21 12:16:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:56,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:56,782 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:56,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:57,000 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,SelfDestructingSolverStorable76 [2021-08-21 12:16:57,001 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:57,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1541229005, now seen corresponding path program 66 times [2021-08-21 12:16:57,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:57,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792070532] [2021-08-21 12:16:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:57,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:57,117 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 12:16:57,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:57,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792070532] [2021-08-21 12:16:57,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792070532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:57,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023707110] [2021-08-21 12:16:57,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:57,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:57,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:57,118 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 12:16:57,119 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 12:16:58,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:16:58,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:16:58,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:58,536 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 19 treesize of output 15 [2021-08-21 12:16:58,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:16:58,612 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 12:16:58,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023707110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:58,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:58,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:16:58,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919716664] [2021-08-21 12:16:58,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:16:58,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:16:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:16:58,613 INFO L87 Difference]: Start difference. First operand 310 states and 921 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 12:16:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:58,875 INFO L93 Difference]: Finished difference Result 566 states and 1670 transitions. [2021-08-21 12:16:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:16:58,875 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 20 [2021-08-21 12:16:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:58,876 INFO L225 Difference]: With dead ends: 566 [2021-08-21 12:16:58,876 INFO L226 Difference]: Without dead ends: 551 [2021-08-21 12:16:58,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:16:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-21 12:16:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 305. [2021-08-21 12:16:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.986842105263158) internal successors, (908), 304 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 908 transitions. [2021-08-21 12:16:58,881 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 908 transitions. Word has length 20 [2021-08-21 12:16:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:58,881 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 908 transitions. [2021-08-21 12:16:58,881 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 12:16:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 908 transitions. [2021-08-21 12:16:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:16:58,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:58,882 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:58,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 12:16:59,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:16:59,084 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:59,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1828235423, now seen corresponding path program 67 times [2021-08-21 12:16:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:59,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488232804] [2021-08-21 12:16:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:59,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:59,249 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 12:16:59,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:59,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488232804] [2021-08-21 12:16:59,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488232804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:59,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069045542] [2021-08-21 12:16:59,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:59,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:59,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:59,269 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 12:16:59,320 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 12:17:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:00,752 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 19 treesize of output 15 [2021-08-21 12:17:00,808 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 20 treesize of output 16 [2021-08-21 12:17:00,908 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 12:17:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069045542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:00,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:00,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:17:00,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695304773] [2021-08-21 12:17:00,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:00,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:00,909 INFO L87 Difference]: Start difference. First operand 305 states and 908 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:01,180 INFO L93 Difference]: Finished difference Result 608 states and 1779 transitions. [2021-08-21 12:17:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:17:01,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:01,182 INFO L225 Difference]: With dead ends: 608 [2021-08-21 12:17:01,182 INFO L226 Difference]: Without dead ends: 593 [2021-08-21 12:17:01,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-08-21 12:17:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 303. [2021-08-21 12:17:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.980132450331126) internal successors, (900), 302 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 900 transitions. [2021-08-21 12:17:01,187 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 900 transitions. Word has length 20 [2021-08-21 12:17:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:01,187 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 900 transitions. [2021-08-21 12:17:01,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 900 transitions. [2021-08-21 12:17:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:01,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:01,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:01,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:01,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 12:17:01,388 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1941217325, now seen corresponding path program 68 times [2021-08-21 12:17:01,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:01,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327167952] [2021-08-21 12:17:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:01,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:01,536 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 12:17:01,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:01,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327167952] [2021-08-21 12:17:01,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327167952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:01,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916140287] [2021-08-21 12:17:01,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:01,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:01,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:01,537 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 12:17:01,538 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 12:17:02,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:02,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:02,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:03,033 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 19 treesize of output 15 [2021-08-21 12:17:03,088 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 21 treesize of output 17 [2021-08-21 12:17:03,163 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 12:17:03,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916140287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:03,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:03,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:17:03,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804246993] [2021-08-21 12:17:03,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:03,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:03,164 INFO L87 Difference]: Start difference. First operand 303 states and 900 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:03,480 INFO L93 Difference]: Finished difference Result 449 states and 1326 transitions. [2021-08-21 12:17:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:17:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:03,482 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:17:03,482 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 12:17:03,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 12:17:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 315. [2021-08-21 12:17:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9904458598726116) internal successors, (939), 314 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 939 transitions. [2021-08-21 12:17:03,486 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 939 transitions. Word has length 20 [2021-08-21 12:17:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:03,486 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 939 transitions. [2021-08-21 12:17:03,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 939 transitions. [2021-08-21 12:17:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:03,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:03,487 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:03,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:03,700 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,SelfDestructingSolverStorable79 [2021-08-21 12:17:03,701 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1345111409, now seen corresponding path program 69 times [2021-08-21 12:17:03,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:03,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528376689] [2021-08-21 12:17:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:03,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:03,856 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 12:17:03,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:03,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528376689] [2021-08-21 12:17:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528376689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:03,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762152309] [2021-08-21 12:17:03,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:03,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:03,869 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 12:17:03,869 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 12:17:05,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:17:05,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:05,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:05,370 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 19 treesize of output 15 [2021-08-21 12:17:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:17:05,511 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 12:17:05,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762152309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:05,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:05,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:17:05,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204591182] [2021-08-21 12:17:05,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:05,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:05,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:05,512 INFO L87 Difference]: Start difference. First operand 315 states and 939 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:05,780 INFO L93 Difference]: Finished difference Result 461 states and 1356 transitions. [2021-08-21 12:17:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:17:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:05,781 INFO L225 Difference]: With dead ends: 461 [2021-08-21 12:17:05,781 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 12:17:05,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 12:17:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2021-08-21 12:17:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9807073954983925) internal successors, (927), 311 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 927 transitions. [2021-08-21 12:17:05,785 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 927 transitions. Word has length 20 [2021-08-21 12:17:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:05,785 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 927 transitions. [2021-08-21 12:17:05,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:05,785 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 927 transitions. [2021-08-21 12:17:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:05,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:05,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:05,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:06,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:06,007 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1837707171, now seen corresponding path program 70 times [2021-08-21 12:17:06,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:06,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083760480] [2021-08-21 12:17:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:06,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:06,144 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 12:17:06,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:06,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083760480] [2021-08-21 12:17:06,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083760480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:06,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545911413] [2021-08-21 12:17:06,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:06,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:06,161 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 12:17:06,210 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 12:17:07,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:07,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:07,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:07,701 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 19 treesize of output 15 [2021-08-21 12:17:07,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:17:07,825 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 12:17:07,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545911413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:07,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:07,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:17:07,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52297852] [2021-08-21 12:17:07,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:07,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:07,826 INFO L87 Difference]: Start difference. First operand 312 states and 927 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:08,063 INFO L93 Difference]: Finished difference Result 436 states and 1287 transitions. [2021-08-21 12:17:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:17:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:08,064 INFO L225 Difference]: With dead ends: 436 [2021-08-21 12:17:08,064 INFO L226 Difference]: Without dead ends: 421 [2021-08-21 12:17:08,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:17:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-21 12:17:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-08-21 12:17:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9805194805194803) internal successors, (918), 308 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 918 transitions. [2021-08-21 12:17:08,069 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 918 transitions. Word has length 20 [2021-08-21 12:17:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:08,069 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 918 transitions. [2021-08-21 12:17:08,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 918 transitions. [2021-08-21 12:17:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:08,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:08,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:08,090 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 12:17:08,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:08,270 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:08,270 INFO L82 PathProgramCache]: Analyzing trace with hash -352617845, now seen corresponding path program 71 times [2021-08-21 12:17:08,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:08,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472430499] [2021-08-21 12:17:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:08,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:08,443 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 12:17:08,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:08,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472430499] [2021-08-21 12:17:08,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472430499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:08,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017419048] [2021-08-21 12:17:08,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:08,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:08,444 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 12:17:08,445 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 12:17:09,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:17:09,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:17:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:09,951 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 19 treesize of output 15 [2021-08-21 12:17:09,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:17:10,230 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 12:17:10,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017419048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:10,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:10,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:17:10,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894575096] [2021-08-21 12:17:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:10,231 INFO L87 Difference]: Start difference. First operand 309 states and 918 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:10,590 INFO L93 Difference]: Finished difference Result 557 states and 1655 transitions. [2021-08-21 12:17:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:17:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:10,591 INFO L225 Difference]: With dead ends: 557 [2021-08-21 12:17:10,592 INFO L226 Difference]: Without dead ends: 542 [2021-08-21 12:17:10,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:17:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-08-21 12:17:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 309. [2021-08-21 12:17:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9805194805194803) internal successors, (918), 308 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 918 transitions. [2021-08-21 12:17:10,596 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 918 transitions. Word has length 20 [2021-08-21 12:17:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:10,596 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 918 transitions. [2021-08-21 12:17:10,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 918 transitions. [2021-08-21 12:17:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:10,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:10,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:10,617 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 12:17:10,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:10,817 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash 265545737, now seen corresponding path program 72 times [2021-08-21 12:17:10,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:10,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179566442] [2021-08-21 12:17:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:10,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:10,927 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 12:17:10,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:10,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179566442] [2021-08-21 12:17:10,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179566442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:10,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547233704] [2021-08-21 12:17:10,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:10,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:10,929 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 12:17:10,930 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 12:17:12,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:17:12,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:12,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:12,445 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 19 treesize of output 15 [2021-08-21 12:17:12,504 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 21 treesize of output 17 [2021-08-21 12:17:12,548 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 12:17:12,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547233704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:12,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:12,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:17:12,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145484398] [2021-08-21 12:17:12,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:17:12,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:17:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:12,549 INFO L87 Difference]: Start difference. First operand 309 states and 918 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:13,157 INFO L93 Difference]: Finished difference Result 714 states and 2084 transitions. [2021-08-21 12:17:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:17:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:13,159 INFO L225 Difference]: With dead ends: 714 [2021-08-21 12:17:13,159 INFO L226 Difference]: Without dead ends: 699 [2021-08-21 12:17:13,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:17:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-08-21 12:17:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 315. [2021-08-21 12:17:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9808917197452227) internal successors, (936), 314 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 936 transitions. [2021-08-21 12:17:13,164 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 936 transitions. Word has length 20 [2021-08-21 12:17:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:13,164 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 936 transitions. [2021-08-21 12:17:13,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 936 transitions. [2021-08-21 12:17:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:13,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:13,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:13,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:13,382 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,SelfDestructingSolverStorable83 [2021-08-21 12:17:13,382 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:13,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:13,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1677154455, now seen corresponding path program 73 times [2021-08-21 12:17:13,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:13,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724823550] [2021-08-21 12:17:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:13,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:13,516 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 12:17:13,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724823550] [2021-08-21 12:17:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724823550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125025178] [2021-08-21 12:17:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:13,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:13,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:13,517 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 12:17:13,518 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 12:17:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:15,052 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 19 treesize of output 15 [2021-08-21 12:17:15,107 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 21 treesize of output 17 [2021-08-21 12:17:15,150 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 12:17:15,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125025178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:15,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:15,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:17:15,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886906297] [2021-08-21 12:17:15,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:15,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:15,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:15,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:15,151 INFO L87 Difference]: Start difference. First operand 315 states and 936 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:15,431 INFO L93 Difference]: Finished difference Result 595 states and 1739 transitions. [2021-08-21 12:17:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:17:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:15,433 INFO L225 Difference]: With dead ends: 595 [2021-08-21 12:17:15,433 INFO L226 Difference]: Without dead ends: 580 [2021-08-21 12:17:15,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:17:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-21 12:17:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 324. [2021-08-21 12:17:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9907120743034055) internal successors, (966), 323 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 966 transitions. [2021-08-21 12:17:15,439 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 966 transitions. Word has length 20 [2021-08-21 12:17:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:15,439 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 966 transitions. [2021-08-21 12:17:15,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 966 transitions. [2021-08-21 12:17:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:15,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:15,440 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:15,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:15,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:15,669 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1032004319, now seen corresponding path program 74 times [2021-08-21 12:17:15,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:15,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690218436] [2021-08-21 12:17:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:15,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:15,791 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 12:17:15,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:15,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690218436] [2021-08-21 12:17:15,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690218436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:15,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029869502] [2021-08-21 12:17:15,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:15,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:15,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:15,792 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 12:17:15,793 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 12:17:17,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:17,363 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 19 treesize of output 15 [2021-08-21 12:17:17,384 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 21 treesize of output 17 [2021-08-21 12:17:17,444 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 12:17:17,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029869502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:17,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:17,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:17:17,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985836641] [2021-08-21 12:17:17,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:17:17,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:17:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:17,445 INFO L87 Difference]: Start difference. First operand 324 states and 966 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:17,769 INFO L93 Difference]: Finished difference Result 603 states and 1763 transitions. [2021-08-21 12:17:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:17:17,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:17,770 INFO L225 Difference]: With dead ends: 603 [2021-08-21 12:17:17,770 INFO L226 Difference]: Without dead ends: 588 [2021-08-21 12:17:17,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:17:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-08-21 12:17:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 318. [2021-08-21 12:17:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9810725552050474) internal successors, (945), 317 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 945 transitions. [2021-08-21 12:17:17,776 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 945 transitions. Word has length 20 [2021-08-21 12:17:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:17,776 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 945 transitions. [2021-08-21 12:17:17,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 945 transitions. [2021-08-21 12:17:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:17,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:17,777 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:17,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:17,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:17,989 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:17,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1619749641, now seen corresponding path program 75 times [2021-08-21 12:17:17,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:17,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936446302] [2021-08-21 12:17:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:17,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,102 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 12:17:18,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936446302] [2021-08-21 12:17:18,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936446302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:18,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916413600] [2021-08-21 12:17:18,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:18,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:18,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:18,103 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 12:17:18,104 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 12:17:19,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:17:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:17:19,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:19,611 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 41 treesize of output 33 [2021-08-21 12:17:19,665 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 47 treesize of output 39 [2021-08-21 12:17:19,666 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 39 treesize of output 31 [2021-08-21 12:17:19,863 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 12:17:19,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916413600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:19,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:19,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:17:19,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823068399] [2021-08-21 12:17:19,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:17:19,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:17:19,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:19,864 INFO L87 Difference]: Start difference. First operand 318 states and 945 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:20,947 INFO L93 Difference]: Finished difference Result 638 states and 1912 transitions. [2021-08-21 12:17:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:17:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:20,948 INFO L225 Difference]: With dead ends: 638 [2021-08-21 12:17:20,948 INFO L226 Difference]: Without dead ends: 608 [2021-08-21 12:17:20,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 934.3ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:17:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-21 12:17:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 312. [2021-08-21 12:17:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9807073954983925) internal successors, (927), 311 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 927 transitions. [2021-08-21 12:17:20,953 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 927 transitions. Word has length 20 [2021-08-21 12:17:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:20,954 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 927 transitions. [2021-08-21 12:17:20,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 927 transitions. [2021-08-21 12:17:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:20,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:20,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:20,975 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 12:17:21,168 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,SelfDestructingSolverStorable86 [2021-08-21 12:17:21,169 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:21,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:21,169 INFO L82 PathProgramCache]: Analyzing trace with hash 927869937, now seen corresponding path program 76 times [2021-08-21 12:17:21,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:21,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595980217] [2021-08-21 12:17:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:21,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:21,300 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 12:17:21,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:21,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595980217] [2021-08-21 12:17:21,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595980217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:21,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403452684] [2021-08-21 12:17:21,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:21,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:21,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:21,301 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 12:17:21,302 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 12:17:22,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:22,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:22,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:22,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:22,478 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 19 treesize of output 15 [2021-08-21 12:17:22,537 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 21 treesize of output 17 [2021-08-21 12:17:22,582 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 12:17:22,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403452684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:22,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:22,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:17:22,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362082736] [2021-08-21 12:17:22,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:17:22,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:17:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:22,583 INFO L87 Difference]: Start difference. First operand 312 states and 927 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:22,940 INFO L93 Difference]: Finished difference Result 578 states and 1702 transitions. [2021-08-21 12:17:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:22,942 INFO L225 Difference]: With dead ends: 578 [2021-08-21 12:17:22,942 INFO L226 Difference]: Without dead ends: 563 [2021-08-21 12:17:22,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:17:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-08-21 12:17:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 322. [2021-08-21 12:17:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9906542056074765) internal successors, (960), 321 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 960 transitions. [2021-08-21 12:17:22,947 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 960 transitions. Word has length 20 [2021-08-21 12:17:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:22,947 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 960 transitions. [2021-08-21 12:17:22,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 960 transitions. [2021-08-21 12:17:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:22,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:22,948 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:22,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:23,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 12:17:23,157 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash -657938585, now seen corresponding path program 77 times [2021-08-21 12:17:23,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:23,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133087127] [2021-08-21 12:17:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:23,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:23,294 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 12:17:23,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:23,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133087127] [2021-08-21 12:17:23,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133087127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:23,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157420023] [2021-08-21 12:17:23,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:23,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:23,295 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 12:17:23,296 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 12:17:24,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:24,958 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 19 treesize of output 15 [2021-08-21 12:17:24,985 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 21 treesize of output 17 [2021-08-21 12:17:25,067 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 12:17:25,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157420023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:25,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:25,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:17:25,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196595054] [2021-08-21 12:17:25,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:17:25,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:17:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:25,068 INFO L87 Difference]: Start difference. First operand 322 states and 960 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:25,430 INFO L93 Difference]: Finished difference Result 594 states and 1744 transitions. [2021-08-21 12:17:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:25,431 INFO L225 Difference]: With dead ends: 594 [2021-08-21 12:17:25,431 INFO L226 Difference]: Without dead ends: 579 [2021-08-21 12:17:25,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:17:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-21 12:17:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 319. [2021-08-21 12:17:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.981132075471698) internal successors, (948), 318 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 948 transitions. [2021-08-21 12:17:25,436 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 948 transitions. Word has length 20 [2021-08-21 12:17:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:25,436 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 948 transitions. [2021-08-21 12:17:25,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 948 transitions. [2021-08-21 12:17:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:25,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:25,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:25,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:25,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:25,657 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash -70193263, now seen corresponding path program 78 times [2021-08-21 12:17:25,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:25,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643826884] [2021-08-21 12:17:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:25,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:25,788 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 12:17:25,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:25,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643826884] [2021-08-21 12:17:25,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643826884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:25,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281709319] [2021-08-21 12:17:25,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:25,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:25,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:25,790 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 12:17:25,791 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 12:17:27,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:17:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:27,478 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 19 treesize of output 15 [2021-08-21 12:17:27,504 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 21 treesize of output 17 [2021-08-21 12:17:27,585 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 12:17:27,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281709319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:27,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:27,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:17:27,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291763535] [2021-08-21 12:17:27,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:17:27,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:17:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:27,586 INFO L87 Difference]: Start difference. First operand 319 states and 948 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:27,937 INFO L93 Difference]: Finished difference Result 574 states and 1690 transitions. [2021-08-21 12:17:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:27,939 INFO L225 Difference]: With dead ends: 574 [2021-08-21 12:17:27,939 INFO L226 Difference]: Without dead ends: 559 [2021-08-21 12:17:27,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:17:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-21 12:17:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 316. [2021-08-21 12:17:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-08-21 12:17:27,943 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 20 [2021-08-21 12:17:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:27,944 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-08-21 12:17:27,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-08-21 12:17:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:27,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:27,944 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:27,968 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 12:17:28,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:28,153 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1398890683, now seen corresponding path program 79 times [2021-08-21 12:17:28,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:28,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150335526] [2021-08-21 12:17:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:28,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:28,305 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 12:17:28,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:28,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150335526] [2021-08-21 12:17:28,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150335526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:28,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885327973] [2021-08-21 12:17:28,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:28,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:28,306 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 12:17:28,307 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 12:17:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:29,956 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 19 treesize of output 15 [2021-08-21 12:17:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:17:30,105 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 12:17:30,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885327973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:30,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:30,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:17:30,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062678481] [2021-08-21 12:17:30,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:17:30,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:17:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:30,106 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:30,587 INFO L93 Difference]: Finished difference Result 695 states and 2045 transitions. [2021-08-21 12:17:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:17:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:30,589 INFO L225 Difference]: With dead ends: 695 [2021-08-21 12:17:30,589 INFO L226 Difference]: Without dead ends: 680 [2021-08-21 12:17:30,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:17:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-21 12:17:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 325. [2021-08-21 12:17:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-08-21 12:17:30,594 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-08-21 12:17:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:30,594 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-08-21 12:17:30,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-08-21 12:17:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:30,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:30,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:30,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:30,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:30,808 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1056166379, now seen corresponding path program 80 times [2021-08-21 12:17:30,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:30,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751127334] [2021-08-21 12:17:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:30,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:30,934 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 12:17:30,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:30,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751127334] [2021-08-21 12:17:30,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751127334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:30,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675180573] [2021-08-21 12:17:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:30,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:30,935 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 12:17:30,937 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 12:17:32,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:32,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:32,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:32,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:32,387 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 19 treesize of output 15 [2021-08-21 12:17:32,460 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 21 treesize of output 17 [2021-08-21 12:17:32,500 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 12:17:32,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675180573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:32,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:32,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:17:32,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779404904] [2021-08-21 12:17:32,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:32,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:32,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:32,501 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:32,751 INFO L93 Difference]: Finished difference Result 580 states and 1705 transitions. [2021-08-21 12:17:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:17:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:32,753 INFO L225 Difference]: With dead ends: 580 [2021-08-21 12:17:32,753 INFO L226 Difference]: Without dead ends: 565 [2021-08-21 12:17:32,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:17:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-21 12:17:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 329. [2021-08-21 12:17:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:17:32,757 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:17:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:32,757 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:17:32,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:17:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:32,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:32,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:32,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:32,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:32,973 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1197126641, now seen corresponding path program 81 times [2021-08-21 12:17:32,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:32,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686861228] [2021-08-21 12:17:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:32,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:33,065 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 12:17:33,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:33,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686861228] [2021-08-21 12:17:33,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686861228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:33,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560440678] [2021-08-21 12:17:33,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:33,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:33,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:33,067 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 12:17:33,068 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 12:17:34,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:17:34,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:34,724 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 19 treesize of output 15 [2021-08-21 12:17:34,775 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 21 treesize of output 17 [2021-08-21 12:17:34,806 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 12:17:34,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560440678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:34,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:34,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:17:34,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698754293] [2021-08-21 12:17:34,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:34,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:34,807 INFO L87 Difference]: Start difference. First operand 329 states and 978 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 12:17:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:35,053 INFO L93 Difference]: Finished difference Result 505 states and 1490 transitions. [2021-08-21 12:17:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:17:35,054 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 20 [2021-08-21 12:17:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:35,055 INFO L225 Difference]: With dead ends: 505 [2021-08-21 12:17:35,055 INFO L226 Difference]: Without dead ends: 490 [2021-08-21 12:17:35,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-21 12:17:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 336. [2021-08-21 12:17:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.988059701492537) internal successors, (1001), 335 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1001 transitions. [2021-08-21 12:17:35,059 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1001 transitions. Word has length 20 [2021-08-21 12:17:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:35,059 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1001 transitions. [2021-08-21 12:17:35,059 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 12:17:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1001 transitions. [2021-08-21 12:17:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:35,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:35,060 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:35,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 12:17:35,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:35,264 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:35,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1018546827, now seen corresponding path program 82 times [2021-08-21 12:17:35,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:35,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768035938] [2021-08-21 12:17:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:35,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:35,380 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 12:17:35,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:35,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768035938] [2021-08-21 12:17:35,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768035938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:35,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147068376] [2021-08-21 12:17:35,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:35,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:35,397 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 12:17:35,435 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 12:17:37,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:37,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:37,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:37,078 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 19 treesize of output 15 [2021-08-21 12:17:37,091 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 21 treesize of output 17 [2021-08-21 12:17:37,142 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 12:17:37,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147068376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:37,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:37,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:17:37,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994940774] [2021-08-21 12:17:37,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:37,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:37,144 INFO L87 Difference]: Start difference. First operand 336 states and 1001 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 12:17:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,271 INFO L93 Difference]: Finished difference Result 511 states and 1503 transitions. [2021-08-21 12:17:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:17:37,271 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 20 [2021-08-21 12:17:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,272 INFO L225 Difference]: With dead ends: 511 [2021-08-21 12:17:37,272 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 12:17:37,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 12:17:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 333. [2021-08-21 12:17:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9819277108433737) internal successors, (990), 332 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 990 transitions. [2021-08-21 12:17:37,277 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 990 transitions. Word has length 20 [2021-08-21 12:17:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,277 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 990 transitions. [2021-08-21 12:17:37,277 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 12:17:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 990 transitions. [2021-08-21 12:17:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:37,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,277 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,298 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 12:17:37,498 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,SelfDestructingSolverStorable93 [2021-08-21 12:17:37,498 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1127623933, now seen corresponding path program 83 times [2021-08-21 12:17:37,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488087077] [2021-08-21 12:17:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,610 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 12:17:37,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:37,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488087077] [2021-08-21 12:17:37,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488087077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:37,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519646244] [2021-08-21 12:17:37,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:37,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:37,621 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 12:17:37,624 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 12:17:39,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:17:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:39,338 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 19 treesize of output 15 [2021-08-21 12:17:39,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:17:39,389 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 12:17:39,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519646244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:39,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:39,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:17:39,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671290635] [2021-08-21 12:17:39,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:39,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:39,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:39,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:39,390 INFO L87 Difference]: Start difference. First operand 333 states and 990 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 12:17:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:39,518 INFO L93 Difference]: Finished difference Result 466 states and 1374 transitions. [2021-08-21 12:17:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:39,518 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 20 [2021-08-21 12:17:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:39,519 INFO L225 Difference]: With dead ends: 466 [2021-08-21 12:17:39,519 INFO L226 Difference]: Without dead ends: 451 [2021-08-21 12:17:39,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-21 12:17:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 330. [2021-08-21 12:17:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-08-21 12:17:39,523 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-08-21 12:17:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:39,523 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-08-21 12:17:39,523 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 12:17:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-08-21 12:17:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:39,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:39,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:39,548 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 12:17:39,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:39,746 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash 418356929, now seen corresponding path program 84 times [2021-08-21 12:17:39,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:39,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219544830] [2021-08-21 12:17:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:39,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:39,876 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 12:17:39,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:39,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219544830] [2021-08-21 12:17:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219544830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:39,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228558361] [2021-08-21 12:17:39,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:39,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:39,893 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 12:17:39,909 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 12:17:41,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:17:41,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:41,698 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 19 treesize of output 15 [2021-08-21 12:17:41,789 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 21 treesize of output 17 [2021-08-21 12:17:41,832 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 12:17:41,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228558361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:41,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:41,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:17:41,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568331365] [2021-08-21 12:17:41,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:41,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:41,833 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:42,023 INFO L93 Difference]: Finished difference Result 503 states and 1476 transitions. [2021-08-21 12:17:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:42,025 INFO L225 Difference]: With dead ends: 503 [2021-08-21 12:17:42,025 INFO L226 Difference]: Without dead ends: 488 [2021-08-21 12:17:42,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-08-21 12:17:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 336. [2021-08-21 12:17:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.011940298507463) internal successors, (1009), 335 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1009 transitions. [2021-08-21 12:17:42,030 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1009 transitions. Word has length 20 [2021-08-21 12:17:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:42,030 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1009 transitions. [2021-08-21 12:17:42,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1009 transitions. [2021-08-21 12:17:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:42,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:42,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:42,054 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 12:17:42,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:42,245 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1167451593, now seen corresponding path program 85 times [2021-08-21 12:17:42,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:42,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471063642] [2021-08-21 12:17:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:42,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:42,372 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 12:17:42,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:42,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471063642] [2021-08-21 12:17:42,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471063642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:42,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095964333] [2021-08-21 12:17:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:42,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:42,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:42,389 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 12:17:42,399 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 12:17:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:44,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:44,082 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 19 treesize of output 15 [2021-08-21 12:17:44,129 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 21 treesize of output 17 [2021-08-21 12:17:44,165 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 12:17:44,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095964333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:44,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:44,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:17:44,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936384631] [2021-08-21 12:17:44,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:17:44,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:17:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:44,166 INFO L87 Difference]: Start difference. First operand 336 states and 1009 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:17:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:44,328 INFO L93 Difference]: Finished difference Result 445 states and 1309 transitions. [2021-08-21 12:17:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:17:44,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 20 [2021-08-21 12:17:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:44,329 INFO L225 Difference]: With dead ends: 445 [2021-08-21 12:17:44,329 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 12:17:44,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 12:17:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 334. [2021-08-21 12:17:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.009009009009009) internal successors, (1002), 333 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1002 transitions. [2021-08-21 12:17:44,333 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1002 transitions. Word has length 20 [2021-08-21 12:17:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:44,333 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1002 transitions. [2021-08-21 12:17:44,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:17:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1002 transitions. [2021-08-21 12:17:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:44,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:44,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:44,355 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 12:17:44,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:44,544 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:44,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1628998015, now seen corresponding path program 86 times [2021-08-21 12:17:44,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:44,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632459719] [2021-08-21 12:17:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:44,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:44,794 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 12:17:44,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:44,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632459719] [2021-08-21 12:17:44,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632459719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:44,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449835267] [2021-08-21 12:17:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:44,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:44,795 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 12:17:44,844 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 12:17:46,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:46,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:46,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:46,632 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 19 treesize of output 15 [2021-08-21 12:17:46,701 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 21 treesize of output 17 [2021-08-21 12:17:46,773 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 12:17:46,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449835267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:46,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:46,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:17:46,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414116507] [2021-08-21 12:17:46,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:46,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:46,774 INFO L87 Difference]: Start difference. First operand 334 states and 1002 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:46,942 INFO L93 Difference]: Finished difference Result 503 states and 1480 transitions. [2021-08-21 12:17:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:46,943 INFO L225 Difference]: With dead ends: 503 [2021-08-21 12:17:46,943 INFO L226 Difference]: Without dead ends: 488 [2021-08-21 12:17:46,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:46,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-08-21 12:17:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 331. [2021-08-21 12:17:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.003030303030303) internal successors, (991), 330 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 991 transitions. [2021-08-21 12:17:46,948 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 991 transitions. Word has length 20 [2021-08-21 12:17:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:46,948 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 991 transitions. [2021-08-21 12:17:46,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 991 transitions. [2021-08-21 12:17:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:46,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:46,949 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:46,971 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 12:17:47,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:47,157 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1056635443, now seen corresponding path program 87 times [2021-08-21 12:17:47,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:47,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788544245] [2021-08-21 12:17:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:47,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:47,286 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 12:17:47,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788544245] [2021-08-21 12:17:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788544245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665692909] [2021-08-21 12:17:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:47,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:47,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:47,287 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 12:17:47,298 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 12:17:48,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:17:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:49,051 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 19 treesize of output 15 [2021-08-21 12:17:49,081 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 21 treesize of output 17 [2021-08-21 12:17:49,146 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 12:17:49,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665692909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:49,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:49,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:17:49,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028891383] [2021-08-21 12:17:49,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:17:49,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:17:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:49,147 INFO L87 Difference]: Start difference. First operand 331 states and 991 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:17:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:49,267 INFO L93 Difference]: Finished difference Result 448 states and 1315 transitions. [2021-08-21 12:17:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:17:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 20 [2021-08-21 12:17:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:49,268 INFO L225 Difference]: With dead ends: 448 [2021-08-21 12:17:49,268 INFO L226 Difference]: Without dead ends: 433 [2021-08-21 12:17:49,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-21 12:17:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 330. [2021-08-21 12:17:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-08-21 12:17:49,272 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-08-21 12:17:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:49,272 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-08-21 12:17:49,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:17:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-08-21 12:17:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:49,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:49,273 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:49,294 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 12:17:49,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:49,473 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1548388949, now seen corresponding path program 88 times [2021-08-21 12:17:49,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:49,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549487561] [2021-08-21 12:17:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:49,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:49,600 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 12:17:49,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:49,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549487561] [2021-08-21 12:17:49,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549487561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:49,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128774478] [2021-08-21 12:17:49,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:49,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:49,601 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 12:17:49,602 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 12:17:51,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:51,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:51,466 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 19 treesize of output 15 [2021-08-21 12:17:51,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:17:51,557 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 12:17:51,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128774478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:51,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:51,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:17:51,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233275606] [2021-08-21 12:17:51,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:17:51,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:17:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:51,558 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:17:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:51,705 INFO L93 Difference]: Finished difference Result 430 states and 1262 transitions. [2021-08-21 12:17:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:17:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 20 [2021-08-21 12:17:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:51,706 INFO L225 Difference]: With dead ends: 430 [2021-08-21 12:17:51,706 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:17:51,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:17:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 325. [2021-08-21 12:17:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-08-21 12:17:51,710 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-08-21 12:17:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-08-21 12:17:51,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:17:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-08-21 12:17:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:51,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:51,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:51,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:51,912 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,SelfDestructingSolverStorable99 [2021-08-21 12:17:51,913 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:51,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1046093839, now seen corresponding path program 89 times [2021-08-21 12:17:51,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:51,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804983386] [2021-08-21 12:17:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:51,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,135 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 12:17:52,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804983386] [2021-08-21 12:17:52,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804983386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:52,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929975204] [2021-08-21 12:17:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:52,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:52,136 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 12:17:52,137 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 12:17:53,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:53,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:54,115 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:17:54,316 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:54,316 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 35 treesize of output 34 [2021-08-21 12:17:54,322 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:54,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 18 [2021-08-21 12:17:54,365 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 12:17:54,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929975204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:54,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:54,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:17:54,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14738873] [2021-08-21 12:17:54,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:17:54,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:17:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:54,366 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:54,566 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-08-21 12:17:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:54,568 INFO L225 Difference]: With dead ends: 444 [2021-08-21 12:17:54,568 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 12:17:54,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 12:17:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 331. [2021-08-21 12:17:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-08-21 12:17:54,572 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 20 [2021-08-21 12:17:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:54,572 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-08-21 12:17:54,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-08-21 12:17:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:54,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:54,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:54,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:54,780 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,SelfDestructingSolverStorable100 [2021-08-21 12:17:54,781 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1663064935, now seen corresponding path program 90 times [2021-08-21 12:17:54,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:54,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415860903] [2021-08-21 12:17:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:54,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:54,948 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 12:17:54,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:54,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415860903] [2021-08-21 12:17:54,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415860903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:54,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001893569] [2021-08-21 12:17:54,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:54,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:54,949 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 12:17:54,951 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 12:17:56,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:17:56,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:56,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:56,937 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:17:57,001 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:57,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:17:57,007 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:57,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:17:57,088 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 12:17:57,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001893569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:57,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:57,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:17:57,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13493990] [2021-08-21 12:17:57,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:17:57,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:17:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:57,089 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:57,347 INFO L93 Difference]: Finished difference Result 450 states and 1323 transitions. [2021-08-21 12:17:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:57,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:17:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:57,348 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:17:57,348 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:17:57,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:17:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 329. [2021-08-21 12:17:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:17:57,353 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:17:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:17:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:17:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:17:57,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:57,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:57,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:57,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 12:17:57,561 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2044157039, now seen corresponding path program 91 times [2021-08-21 12:17:57,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:57,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633457855] [2021-08-21 12:17:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:57,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:57,751 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 12:17:57,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:57,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633457855] [2021-08-21 12:17:57,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633457855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:57,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606606563] [2021-08-21 12:17:57,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:57,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:57,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:57,752 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 12:17:57,753 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 12:17:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:17:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:59,739 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:59,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 32 [2021-08-21 12:17:59,785 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:59,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:17:59,791 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:17:59,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:17:59,870 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 12:17:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606606563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:59,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:59,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:17:59,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198858681] [2021-08-21 12:17:59,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:17:59,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:17:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:59,871 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:00,060 INFO L93 Difference]: Finished difference Result 441 states and 1301 transitions. [2021-08-21 12:18:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:00,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:00,061 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:18:00,061 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 12:18:00,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 12:18:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 327. [2021-08-21 12:18:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-08-21 12:18:00,065 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-08-21 12:18:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:00,065 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-08-21 12:18:00,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-08-21 12:18:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:00,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:00,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:00,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:00,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:18:00,275 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:00,275 INFO L82 PathProgramCache]: Analyzing trace with hash 253320373, now seen corresponding path program 92 times [2021-08-21 12:18:00,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:00,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651650176] [2021-08-21 12:18:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:00,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:00,447 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 12:18:00,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:00,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651650176] [2021-08-21 12:18:00,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651650176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:00,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599336930] [2021-08-21 12:18:00,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:00,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:00,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:00,448 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 12:18:00,449 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 12:18:02,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:02,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:02,404 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:02,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:18:02,741 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:02,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 34 [2021-08-21 12:18:02,747 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:02,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 18 [2021-08-21 12:18:02,789 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 12:18:02,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599336930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:02,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:02,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:02,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738759141] [2021-08-21 12:18:02,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:02,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:02,790 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:03,000 INFO L93 Difference]: Finished difference Result 464 states and 1360 transitions. [2021-08-21 12:18:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:03,001 INFO L225 Difference]: With dead ends: 464 [2021-08-21 12:18:03,001 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 12:18:03,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 12:18:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 333. [2021-08-21 12:18:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2021-08-21 12:18:03,005 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 20 [2021-08-21 12:18:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:03,005 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2021-08-21 12:18:03,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2021-08-21 12:18:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:03,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:03,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:03,029 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 12:18:03,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:03,221 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1332488149, now seen corresponding path program 93 times [2021-08-21 12:18:03,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:03,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319107799] [2021-08-21 12:18:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:03,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:03,379 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 12:18:03,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:03,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319107799] [2021-08-21 12:18:03,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319107799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:03,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703975048] [2021-08-21 12:18:03,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:03,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:03,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:03,382 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 12:18:03,382 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 12:18:05,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:18:05,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:05,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:05,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:05,289 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:05,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:18:05,499 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:18:05,506 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:05,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:05,585 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 12:18:05,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703975048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:05,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:05,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:05,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663340713] [2021-08-21 12:18:05,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:05,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:05,586 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:05,754 INFO L93 Difference]: Finished difference Result 458 states and 1347 transitions. [2021-08-21 12:18:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:05,755 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:18:05,755 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:18:05,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:18:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 331. [2021-08-21 12:18:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.996969696969697) internal successors, (989), 330 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 989 transitions. [2021-08-21 12:18:05,759 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 989 transitions. Word has length 20 [2021-08-21 12:18:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:05,759 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 989 transitions. [2021-08-21 12:18:05,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 989 transitions. [2021-08-21 12:18:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:05,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:05,760 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:05,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:05,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:05,977 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1794034571, now seen corresponding path program 94 times [2021-08-21 12:18:05,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:05,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941484123] [2021-08-21 12:18:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:05,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:06,155 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 12:18:06,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:06,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941484123] [2021-08-21 12:18:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941484123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:06,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360856096] [2021-08-21 12:18:06,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:06,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:06,156 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 12:18:06,157 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 12:18:08,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:08,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:08,169 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:08,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:18:08,399 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:08,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:18:08,405 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:08,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:08,461 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 12:18:08,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360856096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:08,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:08,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:08,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888600906] [2021-08-21 12:18:08,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:08,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:08,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:08,462 INFO L87 Difference]: Start difference. First operand 331 states and 989 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:08,621 INFO L93 Difference]: Finished difference Result 456 states and 1340 transitions. [2021-08-21 12:18:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:08,622 INFO L225 Difference]: With dead ends: 456 [2021-08-21 12:18:08,623 INFO L226 Difference]: Without dead ends: 441 [2021-08-21 12:18:08,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-21 12:18:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 328. [2021-08-21 12:18:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9908256880733943) internal successors, (978), 327 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 978 transitions. [2021-08-21 12:18:08,627 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 978 transitions. Word has length 20 [2021-08-21 12:18:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:08,627 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 978 transitions. [2021-08-21 12:18:08,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 978 transitions. [2021-08-21 12:18:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:08,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:08,627 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:08,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 12:18:08,840 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,SelfDestructingSolverStorable105 [2021-08-21 12:18:08,841 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash 891598887, now seen corresponding path program 95 times [2021-08-21 12:18:08,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:08,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933236746] [2021-08-21 12:18:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:08,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:09,032 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 12:18:09,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:09,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933236746] [2021-08-21 12:18:09,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933236746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:09,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000080448] [2021-08-21 12:18:09,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:09,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:09,033 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 12:18:09,034 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 12:18:10,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:11,030 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:11,030 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-08-21 12:18:11,105 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:11,106 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 45 treesize of output 44 [2021-08-21 12:18:11,112 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:11,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:18:11,233 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 12:18:11,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000080448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:11,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:11,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:11,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439378337] [2021-08-21 12:18:11,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:11,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:11,234 INFO L87 Difference]: Start difference. First operand 328 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:11,424 INFO L93 Difference]: Finished difference Result 466 states and 1369 transitions. [2021-08-21 12:18:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:11,425 INFO L225 Difference]: With dead ends: 466 [2021-08-21 12:18:11,425 INFO L226 Difference]: Without dead ends: 451 [2021-08-21 12:18:11,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-21 12:18:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 327. [2021-08-21 12:18:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-08-21 12:18:11,429 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-08-21 12:18:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:11,429 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-08-21 12:18:11,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-08-21 12:18:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:11,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:11,429 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:11,451 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 12:18:11,630 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,SelfDestructingSolverStorable106 [2021-08-21 12:18:11,630 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:11,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1816935659, now seen corresponding path program 96 times [2021-08-21 12:18:11,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:11,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436133433] [2021-08-21 12:18:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:11,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:11,800 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 12:18:11,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:11,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436133433] [2021-08-21 12:18:11,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436133433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:11,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448886724] [2021-08-21 12:18:11,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:11,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:11,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:11,801 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 12:18:11,802 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 12:18:13,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:18:13,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:13,881 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:13,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:18:14,017 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:14,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:18:14,023 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:14,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:14,105 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 12:18:14,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448886724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:14,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:14,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:14,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786037075] [2021-08-21 12:18:14,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:14,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:14,106 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:14,310 INFO L93 Difference]: Finished difference Result 459 states and 1346 transitions. [2021-08-21 12:18:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:14,311 INFO L225 Difference]: With dead ends: 459 [2021-08-21 12:18:14,311 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 12:18:14,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 12:18:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 330. [2021-08-21 12:18:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-08-21 12:18:14,315 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 20 [2021-08-21 12:18:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:14,315 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-08-21 12:18:14,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-08-21 12:18:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:14,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:14,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:14,338 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 12:18:14,524 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,SelfDestructingSolverStorable107 [2021-08-21 12:18:14,525 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1220829743, now seen corresponding path program 97 times [2021-08-21 12:18:14,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:14,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488601854] [2021-08-21 12:18:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:14,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:14,662 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 12:18:14,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:14,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488601854] [2021-08-21 12:18:14,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488601854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:14,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490111299] [2021-08-21 12:18:14,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:14,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:14,663 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 12:18:14,664 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 12:18:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:16,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:16,570 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:16,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:18:16,613 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:16,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 44 [2021-08-21 12:18:16,618 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:16,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:18:16,673 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 12:18:16,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490111299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:16,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:18:16,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391832437] [2021-08-21 12:18:16,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:18:16,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:18:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:18:16,674 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:16,814 INFO L93 Difference]: Finished difference Result 401 states and 1177 transitions. [2021-08-21 12:18:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:18:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:16,815 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:18:16,815 INFO L226 Difference]: Without dead ends: 386 [2021-08-21 12:18:16,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:18:16,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-21 12:18:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 326. [2021-08-21 12:18:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-08-21 12:18:16,833 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-08-21 12:18:16,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:16,833 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-08-21 12:18:16,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-08-21 12:18:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:16,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:16,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:16,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:17,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:17,053 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2132246361, now seen corresponding path program 98 times [2021-08-21 12:18:17,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:17,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082724096] [2021-08-21 12:18:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:17,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:17,172 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 12:18:17,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:17,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082724096] [2021-08-21 12:18:17,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082724096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:17,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270751552] [2021-08-21 12:18:17,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:17,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:17,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:17,173 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 12:18:17,174 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 12:18:19,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:19,249 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:19,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:18:19,562 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:19,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:18:19,568 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:19,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-08-21 12:18:19,587 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 12:18:19,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270751552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:19,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:19,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:18:19,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411117376] [2021-08-21 12:18:19,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:19,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:19,588 INFO L87 Difference]: Start difference. First operand 326 states and 969 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 12:18:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:19,812 INFO L93 Difference]: Finished difference Result 393 states and 1159 transitions. [2021-08-21 12:18:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:18:19,812 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 20 [2021-08-21 12:18:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:19,813 INFO L225 Difference]: With dead ends: 393 [2021-08-21 12:18:19,813 INFO L226 Difference]: Without dead ends: 378 [2021-08-21 12:18:19,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-21 12:18:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 336. [2021-08-21 12:18:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-08-21 12:18:19,817 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-08-21 12:18:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:19,817 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-08-21 12:18:19,817 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 12:18:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-08-21 12:18:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:19,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:19,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:19,842 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 12:18:20,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:20,025 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:20,025 INFO L82 PathProgramCache]: Analyzing trace with hash 576912413, now seen corresponding path program 99 times [2021-08-21 12:18:20,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:20,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285681274] [2021-08-21 12:18:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:20,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:20,162 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 12:18:20,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:20,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285681274] [2021-08-21 12:18:20,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285681274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:20,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741672780] [2021-08-21 12:18:20,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:20,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:20,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:20,164 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 12:18:20,164 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 12:18:22,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:18:22,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:22,256 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:22,256 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-08-21 12:18:22,470 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:22,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:18:22,477 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:22,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 25 [2021-08-21 12:18:22,524 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 12:18:22,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741672780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:22,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:22,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:18:22,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856716154] [2021-08-21 12:18:22,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:22,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:22,525 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:18:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:22,702 INFO L93 Difference]: Finished difference Result 399 states and 1172 transitions. [2021-08-21 12:18:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:18:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:22,703 INFO L225 Difference]: With dead ends: 399 [2021-08-21 12:18:22,703 INFO L226 Difference]: Without dead ends: 384 [2021-08-21 12:18:22,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-08-21 12:18:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 334. [2021-08-21 12:18:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.993993993993994) internal successors, (997), 333 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 997 transitions. [2021-08-21 12:18:22,706 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 997 transitions. Word has length 20 [2021-08-21 12:18:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:22,707 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 997 transitions. [2021-08-21 12:18:22,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:18:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 997 transitions. [2021-08-21 12:18:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:22,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:22,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:22,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:22,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:22,917 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash 115365991, now seen corresponding path program 100 times [2021-08-21 12:18:22,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:22,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059219081] [2021-08-21 12:18:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:22,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:23,089 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 12:18:23,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:23,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059219081] [2021-08-21 12:18:23,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059219081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:23,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668350148] [2021-08-21 12:18:23,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:23,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:23,090 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 12:18:23,091 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 12:18:25,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:25,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:25,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:25,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:25,234 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:25,234 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 40 treesize of output 39 [2021-08-21 12:18:25,450 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:25,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:18:25,456 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:25,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 25 [2021-08-21 12:18:25,529 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 12:18:25,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668350148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:25,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:25,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:25,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003907675] [2021-08-21 12:18:25,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:25,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:25,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:25,530 INFO L87 Difference]: Start difference. First operand 334 states and 997 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:25,741 INFO L93 Difference]: Finished difference Result 457 states and 1343 transitions. [2021-08-21 12:18:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:25,742 INFO L225 Difference]: With dead ends: 457 [2021-08-21 12:18:25,742 INFO L226 Difference]: Without dead ends: 442 [2021-08-21 12:18:25,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-08-21 12:18:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 331. [2021-08-21 12:18:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.987878787878788) internal successors, (986), 330 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 986 transitions. [2021-08-21 12:18:25,746 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 986 transitions. Word has length 20 [2021-08-21 12:18:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:25,746 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 986 transitions. [2021-08-21 12:18:25,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 986 transitions. [2021-08-21 12:18:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:25,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:25,747 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:25,769 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 12:18:25,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:25,957 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1493967847, now seen corresponding path program 101 times [2021-08-21 12:18:25,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:25,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065603110] [2021-08-21 12:18:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:25,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:26,097 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 12:18:26,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:26,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065603110] [2021-08-21 12:18:26,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065603110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:26,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919781044] [2021-08-21 12:18:26,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:26,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:26,098 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 12:18:26,099 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 12:18:28,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:18:28,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:28,282 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:28,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:18:28,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:28,347 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 42 treesize of output 41 [2021-08-21 12:18:28,354 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:18:28,425 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 12:18:28,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919781044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:28,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:28,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:18:28,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424089435] [2021-08-21 12:18:28,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:18:28,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:28,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:18:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:18:28,426 INFO L87 Difference]: Start difference. First operand 331 states and 986 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:28,549 INFO L93 Difference]: Finished difference Result 415 states and 1218 transitions. [2021-08-21 12:18:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:18:28,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:28,550 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:18:28,550 INFO L226 Difference]: Without dead ends: 400 [2021-08-21 12:18:28,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:18:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-21 12:18:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 330. [2021-08-21 12:18:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-08-21 12:18:28,553 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-08-21 12:18:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:28,554 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-08-21 12:18:28,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-08-21 12:18:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:28,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:28,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:28,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:28,764 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,SelfDestructingSolverStorable112 [2021-08-21 12:18:28,765 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 830517661, now seen corresponding path program 102 times [2021-08-21 12:18:28,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:28,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127069123] [2021-08-21 12:18:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:28,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:28,897 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 12:18:28,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:28,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127069123] [2021-08-21 12:18:28,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127069123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:28,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921535820] [2021-08-21 12:18:28,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:28,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:28,898 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 12:18:28,899 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 12:18:31,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:18:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:31,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:31,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:31,192 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:31,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:18:31,235 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:31,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 treesize of output 35 [2021-08-21 12:18:31,242 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:31,242 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 29 treesize of output 28 [2021-08-21 12:18:31,277 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 12:18:31,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921535820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:31,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:31,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:18:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215044488] [2021-08-21 12:18:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:31,278 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:31,499 INFO L93 Difference]: Finished difference Result 394 states and 1161 transitions. [2021-08-21 12:18:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:18:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:31,500 INFO L225 Difference]: With dead ends: 394 [2021-08-21 12:18:31,500 INFO L226 Difference]: Without dead ends: 379 [2021-08-21 12:18:31,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-21 12:18:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 327. [2021-08-21 12:18:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-08-21 12:18:31,504 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-08-21 12:18:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:31,504 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-08-21 12:18:31,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-08-21 12:18:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:31,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:31,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:31,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:31,712 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,SelfDestructingSolverStorable113 [2021-08-21 12:18:31,713 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 195975057, now seen corresponding path program 103 times [2021-08-21 12:18:31,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:31,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86884635] [2021-08-21 12:18:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:31,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:31,893 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 12:18:31,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:31,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86884635] [2021-08-21 12:18:31,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86884635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:31,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274542281] [2021-08-21 12:18:31,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:31,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:31,909 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 12:18:31,910 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 12:18:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:33,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:34,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:34,090 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:34,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:18:34,136 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:34,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 40 [2021-08-21 12:18:34,142 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:34,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:18:34,256 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 12:18:34,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274542281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:34,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:34,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:34,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970518291] [2021-08-21 12:18:34,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:34,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:34,257 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:34,469 INFO L93 Difference]: Finished difference Result 472 states and 1383 transitions. [2021-08-21 12:18:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:34,470 INFO L225 Difference]: With dead ends: 472 [2021-08-21 12:18:34,470 INFO L226 Difference]: Without dead ends: 457 [2021-08-21 12:18:34,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-21 12:18:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 326. [2021-08-21 12:18:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-08-21 12:18:34,475 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-08-21 12:18:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:34,475 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-08-21 12:18:34,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-08-21 12:18:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:34,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:34,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:34,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:34,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 12:18:34,685 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash -968313187, now seen corresponding path program 104 times [2021-08-21 12:18:34,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:34,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975684710] [2021-08-21 12:18:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:34,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:34,843 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 12:18:34,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:34,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975684710] [2021-08-21 12:18:34,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975684710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:34,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712423257] [2021-08-21 12:18:34,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:34,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:34,845 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 12:18:34,859 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 12:18:37,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:37,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:37,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:37,084 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:18:37,186 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:37,186 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-08-21 12:18:37,192 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:37,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:37,250 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 12:18:37,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712423257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:37,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:37,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:37,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552365377] [2021-08-21 12:18:37,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:37,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:37,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:37,251 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:37,405 INFO L93 Difference]: Finished difference Result 441 states and 1301 transitions. [2021-08-21 12:18:37,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:37,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:37,406 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:18:37,406 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 12:18:37,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 12:18:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 332. [2021-08-21 12:18:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2021-08-21 12:18:37,410 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 20 [2021-08-21 12:18:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:37,410 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2021-08-21 12:18:37,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2021-08-21 12:18:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:37,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:37,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:37,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:37,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:37,633 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -372207271, now seen corresponding path program 105 times [2021-08-21 12:18:37,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:37,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444043179] [2021-08-21 12:18:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:37,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:37,773 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 12:18:37,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:37,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444043179] [2021-08-21 12:18:37,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444043179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:37,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897085020] [2021-08-21 12:18:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:37,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:37,774 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 12:18:37,775 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 12:18:39,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:18:39,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:39,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:40,068 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:18:40,118 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:40,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:18:40,125 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:40,125 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 27 treesize of output 26 [2021-08-21 12:18:40,243 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 12:18:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897085020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:40,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:40,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:40,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718904345] [2021-08-21 12:18:40,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:40,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:40,244 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:40,419 INFO L93 Difference]: Finished difference Result 453 states and 1331 transitions. [2021-08-21 12:18:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:40,420 INFO L225 Difference]: With dead ends: 453 [2021-08-21 12:18:40,420 INFO L226 Difference]: Without dead ends: 438 [2021-08-21 12:18:40,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-21 12:18:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 329. [2021-08-21 12:18:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:18:40,424 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:18:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:18:40,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:18:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:40,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:40,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:40,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:40,625 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,SelfDestructingSolverStorable116 [2021-08-21 12:18:40,625 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash -864803033, now seen corresponding path program 106 times [2021-08-21 12:18:40,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:40,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233256408] [2021-08-21 12:18:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:40,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:40,835 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 12:18:40,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:40,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233256408] [2021-08-21 12:18:40,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233256408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:40,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182021973] [2021-08-21 12:18:40,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:40,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:40,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:40,836 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 12:18:40,837 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 12:18:42,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:42,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:42,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:42,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:43,078 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:43,079 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-08-21 12:18:43,131 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:43,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:18:43,137 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:43,137 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 35 treesize of output 34 [2021-08-21 12:18:43,256 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 12:18:43,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182021973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:43,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:43,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:43,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051956273] [2021-08-21 12:18:43,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:43,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:43,257 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:43,415 INFO L93 Difference]: Finished difference Result 445 states and 1312 transitions. [2021-08-21 12:18:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:43,416 INFO L225 Difference]: With dead ends: 445 [2021-08-21 12:18:43,416 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 12:18:43,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 12:18:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 324. [2021-08-21 12:18:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.981424148606811) internal successors, (963), 323 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 963 transitions. [2021-08-21 12:18:43,420 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 963 transitions. Word has length 20 [2021-08-21 12:18:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:43,420 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 963 transitions. [2021-08-21 12:18:43,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 963 transitions. [2021-08-21 12:18:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:43,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:43,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:43,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:43,621 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,SelfDestructingSolverStorable117 [2021-08-21 12:18:43,621 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:43,621 INFO L82 PathProgramCache]: Analyzing trace with hash -528503191, now seen corresponding path program 107 times [2021-08-21 12:18:43,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:43,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569534225] [2021-08-21 12:18:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:43,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:43,777 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 12:18:43,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:43,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569534225] [2021-08-21 12:18:43,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569534225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:43,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570011851] [2021-08-21 12:18:43,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:43,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:43,778 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 12:18:43,779 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 12:18:45,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:46,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:46,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 15 [2021-08-21 12:18:46,205 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 32 treesize of output 28 [2021-08-21 12:18:46,210 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:46,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:46,253 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 12:18:46,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570011851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:46,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:46,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:46,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120032157] [2021-08-21 12:18:46,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:46,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:46,254 INFO L87 Difference]: Start difference. First operand 324 states and 963 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:46,426 INFO L93 Difference]: Finished difference Result 449 states and 1325 transitions. [2021-08-21 12:18:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:46,427 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:18:46,427 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 12:18:46,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 12:18:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 330. [2021-08-21 12:18:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9848024316109423) internal successors, (982), 329 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 982 transitions. [2021-08-21 12:18:46,431 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 982 transitions. Word has length 20 [2021-08-21 12:18:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:46,431 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 982 transitions. [2021-08-21 12:18:46,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 982 transitions. [2021-08-21 12:18:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:46,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:46,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:46,457 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 12:18:46,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:46,636 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:46,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2114311713, now seen corresponding path program 108 times [2021-08-21 12:18:46,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:46,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355962309] [2021-08-21 12:18:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:46,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:46,837 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 12:18:46,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:46,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355962309] [2021-08-21 12:18:46,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355962309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:46,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286856346] [2021-08-21 12:18:46,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:46,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:46,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:46,838 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 12:18:46,839 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 12:18:49,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:18:49,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:49,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:49,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 15 [2021-08-21 12:18:49,196 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 32 treesize of output 28 [2021-08-21 12:18:49,201 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:49,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:49,299 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 12:18:49,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286856346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:49,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:49,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:49,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996855646] [2021-08-21 12:18:49,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:49,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:49,300 INFO L87 Difference]: Start difference. First operand 330 states and 982 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:49,512 INFO L93 Difference]: Finished difference Result 455 states and 1338 transitions. [2021-08-21 12:18:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:49,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:49,513 INFO L225 Difference]: With dead ends: 455 [2021-08-21 12:18:49,513 INFO L226 Difference]: Without dead ends: 440 [2021-08-21 12:18:49,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-21 12:18:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-08-21 12:18:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-08-21 12:18:49,517 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-08-21 12:18:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:49,517 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-08-21 12:18:49,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-08-21 12:18:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:49,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:49,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:49,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:49,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:49,718 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1526566391, now seen corresponding path program 109 times [2021-08-21 12:18:49,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:49,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558650323] [2021-08-21 12:18:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:49,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:49,882 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 12:18:49,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:49,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558650323] [2021-08-21 12:18:49,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558650323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:49,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478065682] [2021-08-21 12:18:49,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:49,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:49,883 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 12:18:49,884 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 12:18:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:52,220 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 30 treesize of output 26 [2021-08-21 12:18:52,252 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:52,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:18:52,257 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:52,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:52,317 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 12:18:52,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478065682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:52,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:52,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:52,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830487040] [2021-08-21 12:18:52,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:52,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:52,318 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:52,470 INFO L93 Difference]: Finished difference Result 446 states and 1316 transitions. [2021-08-21 12:18:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:52,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:52,471 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:18:52,471 INFO L226 Difference]: Without dead ends: 431 [2021-08-21 12:18:52,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-21 12:18:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-08-21 12:18:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-08-21 12:18:52,475 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-08-21 12:18:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:52,475 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-08-21 12:18:52,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-08-21 12:18:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:52,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:52,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:52,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:52,688 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,SelfDestructingSolverStorable120 [2021-08-21 12:18:52,689 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash 770911021, now seen corresponding path program 110 times [2021-08-21 12:18:52,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:52,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897861405] [2021-08-21 12:18:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:52,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:52,880 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 12:18:52,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:52,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897861405] [2021-08-21 12:18:52,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897861405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:52,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884191943] [2021-08-21 12:18:52,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:52,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:52,881 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 12:18:52,882 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 12:18:55,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:55,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:55,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:55,226 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:18:55,364 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 32 treesize of output 28 [2021-08-21 12:18:55,369 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:55,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:18:55,414 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 12:18:55,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884191943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:55,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:55,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:55,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254708439] [2021-08-21 12:18:55,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:55,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:55,415 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:55,607 INFO L93 Difference]: Finished difference Result 469 states and 1375 transitions. [2021-08-21 12:18:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:55,608 INFO L225 Difference]: With dead ends: 469 [2021-08-21 12:18:55,608 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 12:18:55,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 12:18:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 332. [2021-08-21 12:18:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0) internal successors, (993), 331 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 993 transitions. [2021-08-21 12:18:55,613 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 993 transitions. Word has length 20 [2021-08-21 12:18:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:55,613 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 993 transitions. [2021-08-21 12:18:55,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 993 transitions. [2021-08-21 12:18:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:55,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:55,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:55,636 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 12:18:55,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:55,823 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash -814897501, now seen corresponding path program 111 times [2021-08-21 12:18:55,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:55,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776359536] [2021-08-21 12:18:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:55,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:55,988 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 12:18:55,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:55,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776359536] [2021-08-21 12:18:55,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776359536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:55,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353814795] [2021-08-21 12:18:55,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:55,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:55,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:55,990 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 12:18:55,991 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 12:18:57,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:18:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:57,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:18:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:18:57,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 15 [2021-08-21 12:18:57,801 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 32 treesize of output 28 [2021-08-21 12:18:57,805 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:18:57,805 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 24 treesize of output 23 [2021-08-21 12:18:57,851 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 12:18:57,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353814795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:57,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:57,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:18:57,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284437509] [2021-08-21 12:18:57,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:57,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:57,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:57,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:57,852 INFO L87 Difference]: Start difference. First operand 332 states and 993 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:58,004 INFO L93 Difference]: Finished difference Result 463 states and 1362 transitions. [2021-08-21 12:18:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:18:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:58,005 INFO L225 Difference]: With dead ends: 463 [2021-08-21 12:18:58,005 INFO L226 Difference]: Without dead ends: 448 [2021-08-21 12:18:58,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:18:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-08-21 12:18:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 330. [2021-08-21 12:18:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-08-21 12:18:58,009 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-08-21 12:18:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:58,009 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-08-21 12:18:58,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-08-21 12:18:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:18:58,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:58,010 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:58,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:58,232 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,SelfDestructingSolverStorable122 [2021-08-21 12:18:58,233 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1276443923, now seen corresponding path program 112 times [2021-08-21 12:18:58,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:58,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030237575] [2021-08-21 12:18:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:58,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:58,368 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 12:18:58,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:58,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030237575] [2021-08-21 12:18:58,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030237575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:58,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146690444] [2021-08-21 12:18:58,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:58,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:58,369 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 12:18:58,370 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 12:19:00,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:00,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:00,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:19:00,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 15 [2021-08-21 12:19:00,836 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 37 treesize of output 33 [2021-08-21 12:19:00,841 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:00,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:19:00,916 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 12:19:00,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146690444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:00,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:00,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687205029] [2021-08-21 12:19:00,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:00,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:00,917 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:01,084 INFO L93 Difference]: Finished difference Result 461 states and 1355 transitions. [2021-08-21 12:19:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:01,086 INFO L225 Difference]: With dead ends: 461 [2021-08-21 12:19:01,086 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 12:19:01,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 12:19:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 327. [2021-08-21 12:19:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9907975460122698) internal successors, (975), 326 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 975 transitions. [2021-08-21 12:19:01,089 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 975 transitions. Word has length 20 [2021-08-21 12:19:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:01,090 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 975 transitions. [2021-08-21 12:19:01,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 975 transitions. [2021-08-21 12:19:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:01,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:01,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:01,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:01,308 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,SelfDestructingSolverStorable123 [2021-08-21 12:19:01,309 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:01,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1409189535, now seen corresponding path program 113 times [2021-08-21 12:19:01,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:01,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808771734] [2021-08-21 12:19:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:01,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:01,482 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 12:19:01,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:01,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808771734] [2021-08-21 12:19:01,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808771734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:01,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926939580] [2021-08-21 12:19:01,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:01,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:01,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:01,484 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 12:19:01,485 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 12:19:03,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:03,904 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:19:03,948 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:03,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:19:03,954 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:03,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:19:04,072 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 12:19:04,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926939580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:04,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:04,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:04,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521727406] [2021-08-21 12:19:04,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:04,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:04,073 INFO L87 Difference]: Start difference. First operand 327 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:04,254 INFO L93 Difference]: Finished difference Result 471 states and 1384 transitions. [2021-08-21 12:19:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:04,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:04,255 INFO L225 Difference]: With dead ends: 471 [2021-08-21 12:19:04,255 INFO L226 Difference]: Without dead ends: 456 [2021-08-21 12:19:04,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-21 12:19:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 326. [2021-08-21 12:19:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-08-21 12:19:04,259 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-08-21 12:19:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:04,259 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-08-21 12:19:04,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-08-21 12:19:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:04,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:04,260 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:04,286 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 12:19:04,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:04,469 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1299345011, now seen corresponding path program 114 times [2021-08-21 12:19:04,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:04,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977802816] [2021-08-21 12:19:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:04,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:04,638 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 12:19:04,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:04,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977802816] [2021-08-21 12:19:04,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977802816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:04,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746542345] [2021-08-21 12:19:04,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:04,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:04,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:04,640 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 12:19:04,640 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 12:19:06,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:19:06,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:06,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:06,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:06,959 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 35 treesize of output 31 [2021-08-21 12:19:07,096 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:07,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:19:07,102 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:07,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:19:07,184 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 12:19:07,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746542345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:07,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:07,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:07,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917468123] [2021-08-21 12:19:07,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:07,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:07,185 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:07,378 INFO L93 Difference]: Finished difference Result 464 states and 1361 transitions. [2021-08-21 12:19:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:07,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:07,379 INFO L225 Difference]: With dead ends: 464 [2021-08-21 12:19:07,379 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 12:19:07,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 12:19:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 329. [2021-08-21 12:19:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9939024390243905) internal successors, (982), 328 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 982 transitions. [2021-08-21 12:19:07,383 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 982 transitions. Word has length 20 [2021-08-21 12:19:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:07,383 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 982 transitions. [2021-08-21 12:19:07,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 982 transitions. [2021-08-21 12:19:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:07,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:07,384 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:07,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:07,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 12:19:07,593 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash -703239095, now seen corresponding path program 115 times [2021-08-21 12:19:07,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:07,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25031840] [2021-08-21 12:19:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:07,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:07,732 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 12:19:07,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:07,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25031840] [2021-08-21 12:19:07,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25031840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:07,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197727072] [2021-08-21 12:19:07,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:07,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:07,734 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 12:19:07,734 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 12:19:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:10,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:10,158 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 35 treesize of output 31 [2021-08-21 12:19:10,193 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:10,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:19:10,199 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:10,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:19:10,249 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 12:19:10,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197727072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:10,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:10,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:19:10,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430086959] [2021-08-21 12:19:10,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:19:10,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:10,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:19:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:19:10,250 INFO L87 Difference]: Start difference. First operand 329 states and 982 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:10,361 INFO L93 Difference]: Finished difference Result 405 states and 1189 transitions. [2021-08-21 12:19:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:19:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:10,361 INFO L225 Difference]: With dead ends: 405 [2021-08-21 12:19:10,361 INFO L226 Difference]: Without dead ends: 390 [2021-08-21 12:19:10,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:19:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-21 12:19:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 325. [2021-08-21 12:19:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-08-21 12:19:10,365 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-08-21 12:19:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:10,366 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-08-21 12:19:10,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-08-21 12:19:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:10,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:10,367 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:10,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 12:19:10,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 12:19:10,589 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1614655713, now seen corresponding path program 116 times [2021-08-21 12:19:10,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:10,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345557337] [2021-08-21 12:19:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:10,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:10,756 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 12:19:10,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:10,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345557337] [2021-08-21 12:19:10,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345557337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:10,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352200539] [2021-08-21 12:19:10,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:10,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:10,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:10,758 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 12:19:10,759 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 12:19:13,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:13,241 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:13,242 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 30 treesize of output 29 [2021-08-21 12:19:13,437 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:13,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:19:13,443 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:13,443 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 24 treesize of output 23 [2021-08-21 12:19:13,486 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 12:19:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352200539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:13,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:13,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:13,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990792454] [2021-08-21 12:19:13,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:13,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:13,487 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:13,704 INFO L93 Difference]: Finished difference Result 450 states and 1328 transitions. [2021-08-21 12:19:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:13,705 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:19:13,706 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:19:13,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:19:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-08-21 12:19:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.997005988023952) internal successors, (1001), 334 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1001 transitions. [2021-08-21 12:19:13,710 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1001 transitions. Word has length 20 [2021-08-21 12:19:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:13,710 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1001 transitions. [2021-08-21 12:19:13,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1001 transitions. [2021-08-21 12:19:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:13,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:13,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:13,736 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 12:19:13,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:13,921 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1094503061, now seen corresponding path program 117 times [2021-08-21 12:19:13,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:13,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634561319] [2021-08-21 12:19:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:13,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:14,072 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 12:19:14,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634561319] [2021-08-21 12:19:14,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634561319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664031859] [2021-08-21 12:19:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:14,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:14,073 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 12:19:14,074 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 12:19:16,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:19:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:16,550 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:19:16,717 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:16,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:19:16,723 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:19:16,762 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 12:19:16,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664031859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:16,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:16,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:19:16,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798354494] [2021-08-21 12:19:16,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:16,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:16,763 INFO L87 Difference]: Start difference. First operand 335 states and 1001 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:19:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:16,930 INFO L93 Difference]: Finished difference Result 403 states and 1184 transitions. [2021-08-21 12:19:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:19:16,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:16,931 INFO L225 Difference]: With dead ends: 403 [2021-08-21 12:19:16,931 INFO L226 Difference]: Without dead ends: 388 [2021-08-21 12:19:16,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-21 12:19:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 333. [2021-08-21 12:19:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9939759036144578) internal successors, (994), 332 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 994 transitions. [2021-08-21 12:19:16,935 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 994 transitions. Word has length 20 [2021-08-21 12:19:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:16,935 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 994 transitions. [2021-08-21 12:19:16,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:19:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 994 transitions. [2021-08-21 12:19:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:16,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:16,935 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:16,958 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 12:19:17,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:17,142 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash 632956639, now seen corresponding path program 118 times [2021-08-21 12:19:17,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:17,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591723281] [2021-08-21 12:19:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:17,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:17,308 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 12:19:17,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:17,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591723281] [2021-08-21 12:19:17,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591723281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:17,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845870566] [2021-08-21 12:19:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:17,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:17,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:17,309 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 12:19:17,310 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 12:19:19,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:19,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:19,861 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:19,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:19:19,984 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:19,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:19:19,989 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:19,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:19:20,063 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 12:19:20,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845870566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:20,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:20,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:20,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688660789] [2021-08-21 12:19:20,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:20,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:20,064 INFO L87 Difference]: Start difference. First operand 333 states and 994 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:20,257 INFO L93 Difference]: Finished difference Result 462 states and 1358 transitions. [2021-08-21 12:19:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:20,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:20,258 INFO L225 Difference]: With dead ends: 462 [2021-08-21 12:19:20,258 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 12:19:20,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 12:19:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 330. [2021-08-21 12:19:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.987841945288754) internal successors, (983), 329 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 983 transitions. [2021-08-21 12:19:20,262 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 983 transitions. Word has length 20 [2021-08-21 12:19:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:20,262 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 983 transitions. [2021-08-21 12:19:20,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 983 transitions. [2021-08-21 12:19:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:20,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:20,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:20,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:20,480 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,SelfDestructingSolverStorable129 [2021-08-21 12:19:20,481 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:20,481 INFO L82 PathProgramCache]: Analyzing trace with hash -976377199, now seen corresponding path program 119 times [2021-08-21 12:19:20,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:20,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579019687] [2021-08-21 12:19:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:20,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:20,621 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 12:19:20,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:20,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579019687] [2021-08-21 12:19:20,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579019687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:20,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131152582] [2021-08-21 12:19:20,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:20,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:20,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:20,622 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 12:19:20,623 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 12:19:23,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:19:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:23,195 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:23,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:19:23,246 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:23,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:19:23,252 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:19:23,317 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 12:19:23,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131152582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:23,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:23,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:19:23,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534060578] [2021-08-21 12:19:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:19:23,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:19:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:19:23,317 INFO L87 Difference]: Start difference. First operand 330 states and 983 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:23,466 INFO L93 Difference]: Finished difference Result 419 states and 1230 transitions. [2021-08-21 12:19:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:19:23,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:23,466 INFO L225 Difference]: With dead ends: 419 [2021-08-21 12:19:23,467 INFO L226 Difference]: Without dead ends: 404 [2021-08-21 12:19:23,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:19:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-21 12:19:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 329. [2021-08-21 12:19:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:19:23,470 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:19:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:23,470 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:19:23,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:19:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:23,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:23,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:23,494 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 12:19:23,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:23,694 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1348108309, now seen corresponding path program 120 times [2021-08-21 12:19:23,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:23,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836047889] [2021-08-21 12:19:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:23,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:23,832 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 12:19:23,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:23,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836047889] [2021-08-21 12:19:23,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836047889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:23,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955107861] [2021-08-21 12:19:23,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:23,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:23,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:23,833 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 12:19:23,834 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 12:19:26,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:19:26,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:26,466 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:26,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:19:26,511 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:26,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:19:26,517 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:26,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:19:26,554 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 12:19:26,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955107861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:26,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:26,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:19:26,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038294891] [2021-08-21 12:19:26,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:26,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:26,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:26,558 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:26,709 INFO L93 Difference]: Finished difference Result 398 states and 1173 transitions. [2021-08-21 12:19:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:19:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:26,710 INFO L225 Difference]: With dead ends: 398 [2021-08-21 12:19:26,710 INFO L226 Difference]: Without dead ends: 383 [2021-08-21 12:19:26,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-21 12:19:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 326. [2021-08-21 12:19:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-08-21 12:19:26,714 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-08-21 12:19:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:26,714 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-08-21 12:19:26,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-08-21 12:19:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:26,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:26,714 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:26,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:26,915 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 713565705, now seen corresponding path program 121 times [2021-08-21 12:19:26,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:26,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998369233] [2021-08-21 12:19:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:26,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:27,057 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 12:19:27,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:27,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998369233] [2021-08-21 12:19:27,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998369233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:27,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424977153] [2021-08-21 12:19:27,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:27,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:27,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:27,058 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 12:19:27,058 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 12:19:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:29,664 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:29,664 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 30 treesize of output 29 [2021-08-21 12:19:29,713 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:29,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:19:29,719 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:29,719 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 27 treesize of output 26 [2021-08-21 12:19:29,801 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 12:19:29,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424977153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:29,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:19:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557011865] [2021-08-21 12:19:29,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:19:29,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:19:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:19:29,802 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:29,915 INFO L93 Difference]: Finished difference Result 424 states and 1241 transitions. [2021-08-21 12:19:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:19:29,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:29,916 INFO L225 Difference]: With dead ends: 424 [2021-08-21 12:19:29,916 INFO L226 Difference]: Without dead ends: 409 [2021-08-21 12:19:29,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:19:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-21 12:19:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 325. [2021-08-21 12:19:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-08-21 12:19:29,920 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-08-21 12:19:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:29,920 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-08-21 12:19:29,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-08-21 12:19:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:29,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:29,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:29,944 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 12:19:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:30,137 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:30,137 INFO L82 PathProgramCache]: Analyzing trace with hash -450722539, now seen corresponding path program 122 times [2021-08-21 12:19:30,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:30,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808837013] [2021-08-21 12:19:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:30,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:30,318 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 12:19:30,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:30,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808837013] [2021-08-21 12:19:30,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808837013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:30,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014098609] [2021-08-21 12:19:30,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:30,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:30,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:30,319 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 12:19:30,323 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 12:19:32,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:33,001 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 35 treesize of output 31 [2021-08-21 12:19:33,122 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:33,122 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-08-21 12:19:33,128 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:33,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:19:33,209 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 12:19:33,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014098609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:33,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:33,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:33,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922166794] [2021-08-21 12:19:33,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:33,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:33,210 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:33,421 INFO L93 Difference]: Finished difference Result 446 states and 1316 transitions. [2021-08-21 12:19:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:33,422 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:19:33,422 INFO L226 Difference]: Without dead ends: 431 [2021-08-21 12:19:33,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-21 12:19:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 331. [2021-08-21 12:19:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9909090909090907) internal successors, (987), 330 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 987 transitions. [2021-08-21 12:19:33,426 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 987 transitions. Word has length 20 [2021-08-21 12:19:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:33,426 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 987 transitions. [2021-08-21 12:19:33,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 987 transitions. [2021-08-21 12:19:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:33,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:33,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:33,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:33,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:33,636 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:33,636 INFO L82 PathProgramCache]: Analyzing trace with hash 145383377, now seen corresponding path program 123 times [2021-08-21 12:19:33,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:33,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363606237] [2021-08-21 12:19:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:33,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:33,801 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 12:19:33,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:33,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363606237] [2021-08-21 12:19:33,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363606237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:33,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713292783] [2021-08-21 12:19:33,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:33,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:33,802 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 12:19:33,803 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 12:19:36,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:19:36,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:36,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-08-21 12:19:36,453 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:36,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:19:36,459 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:36,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:19:36,578 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 12:19:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713292783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:36,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085428970] [2021-08-21 12:19:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:36,579 INFO L87 Difference]: Start difference. First operand 331 states and 987 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:36,782 INFO L93 Difference]: Finished difference Result 458 states and 1346 transitions. [2021-08-21 12:19:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:36,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:36,784 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:19:36,784 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:19:36,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:19:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 328. [2021-08-21 12:19:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-08-21 12:19:36,788 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-08-21 12:19:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:36,788 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-08-21 12:19:36,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-08-21 12:19:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:36,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:36,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:36,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:36,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:19:36,999 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash -347212385, now seen corresponding path program 124 times [2021-08-21 12:19:36,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:36,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875494193] [2021-08-21 12:19:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:36,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:37,133 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 12:19:37,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:37,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875494193] [2021-08-21 12:19:37,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875494193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:37,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917490419] [2021-08-21 12:19:37,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:37,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:37,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:37,134 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 12:19:37,135 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 12:19:39,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:39,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:39,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:39,816 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:39,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:19:39,861 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:39,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 40 [2021-08-21 12:19:39,867 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:39,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:19:39,996 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 12:19:39,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917490419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:39,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:39,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:19:39,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383242748] [2021-08-21 12:19:39,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:19:39,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:19:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:39,997 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:40,122 INFO L93 Difference]: Finished difference Result 450 states and 1327 transitions. [2021-08-21 12:19:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:40,123 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:19:40,123 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:19:40,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:19:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-08-21 12:19:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.981424148606811) internal successors, (963), 323 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 963 transitions. [2021-08-21 12:19:40,127 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 963 transitions. Word has length 20 [2021-08-21 12:19:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:40,127 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 963 transitions. [2021-08-21 12:19:40,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 963 transitions. [2021-08-21 12:19:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:40,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:40,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:40,153 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 12:19:40,328 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,SelfDestructingSolverStorable135 [2021-08-21 12:19:40,328 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583433, now seen corresponding path program 125 times [2021-08-21 12:19:40,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:40,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817057074] [2021-08-21 12:19:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:40,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:40,436 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 12:19:40,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:40,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817057074] [2021-08-21 12:19:40,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817057074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:40,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701708046] [2021-08-21 12:19:40,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:40,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:40,437 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 12:19:40,438 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 12:19:43,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:19:43,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:43,036 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 19 treesize of output 15 [2021-08-21 12:19:43,091 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 21 treesize of output 17 [2021-08-21 12:19:43,148 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 12:19:43,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701708046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:43,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:43,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:19:43,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698312235] [2021-08-21 12:19:43,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:43,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:43,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:43,149 INFO L87 Difference]: Start difference. First operand 324 states and 963 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:43,329 INFO L93 Difference]: Finished difference Result 567 states and 1671 transitions. [2021-08-21 12:19:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:43,331 INFO L225 Difference]: With dead ends: 567 [2021-08-21 12:19:43,331 INFO L226 Difference]: Without dead ends: 552 [2021-08-21 12:19:43,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:19:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-21 12:19:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 327. [2021-08-21 12:19:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-08-21 12:19:43,335 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-08-21 12:19:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:43,335 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-08-21 12:19:43,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-08-21 12:19:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:43,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:43,336 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:43,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 12:19:43,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:19:43,537 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1256961823, now seen corresponding path program 126 times [2021-08-21 12:19:43,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:43,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67030983] [2021-08-21 12:19:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:43,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:43,686 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 12:19:43,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:43,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67030983] [2021-08-21 12:19:43,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67030983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:43,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259936657] [2021-08-21 12:19:43,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:43,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:43,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:43,687 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 12:19:43,690 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 12:19:46,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:19:46,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:46,359 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 19 treesize of output 15 [2021-08-21 12:19:46,419 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 21 treesize of output 17 [2021-08-21 12:19:46,496 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 12:19:46,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259936657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:46,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:46,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:19:46,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571195672] [2021-08-21 12:19:46,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:46,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:46,497 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:46,681 INFO L93 Difference]: Finished difference Result 477 states and 1407 transitions. [2021-08-21 12:19:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:46,682 INFO L225 Difference]: With dead ends: 477 [2021-08-21 12:19:46,682 INFO L226 Difference]: Without dead ends: 462 [2021-08-21 12:19:46,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-21 12:19:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 333. [2021-08-21 12:19:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9909638554216866) internal successors, (993), 332 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 993 transitions. [2021-08-21 12:19:46,686 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 993 transitions. Word has length 20 [2021-08-21 12:19:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:46,686 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 993 transitions. [2021-08-21 12:19:46,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 993 transitions. [2021-08-21 12:19:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:46,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:46,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:46,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 12:19:46,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:46,897 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash -660855907, now seen corresponding path program 127 times [2021-08-21 12:19:46,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:46,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368688930] [2021-08-21 12:19:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:46,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:47,054 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 12:19:47,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:47,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368688930] [2021-08-21 12:19:47,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368688930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:47,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987940919] [2021-08-21 12:19:47,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:47,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:47,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:47,055 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 12:19:47,058 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 12:19:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:49,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:49,751 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 19 treesize of output 15 [2021-08-21 12:19:49,779 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 21 treesize of output 17 [2021-08-21 12:19:49,891 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 12:19:49,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987940919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:49,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:49,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:19:49,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537192080] [2021-08-21 12:19:49,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:49,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:49,892 INFO L87 Difference]: Start difference. First operand 333 states and 993 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:50,061 INFO L93 Difference]: Finished difference Result 489 states and 1437 transitions. [2021-08-21 12:19:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:50,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:50,062 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:19:50,062 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:19:50,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:19:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 330. [2021-08-21 12:19:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-08-21 12:19:50,066 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-08-21 12:19:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:50,066 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-08-21 12:19:50,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-08-21 12:19:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:50,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:50,067 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:50,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:50,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:50,277 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:50,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:50,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1153451669, now seen corresponding path program 128 times [2021-08-21 12:19:50,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:50,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437026665] [2021-08-21 12:19:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:50,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:50,434 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 12:19:50,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:50,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437026665] [2021-08-21 12:19:50,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437026665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:50,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463521275] [2021-08-21 12:19:50,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:50,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:50,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:50,435 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 12:19:50,441 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 12:19:53,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:53,223 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 19 treesize of output 15 [2021-08-21 12:19:53,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:19:53,361 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 12:19:53,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463521275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:53,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:53,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:19:53,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058058112] [2021-08-21 12:19:53,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:53,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:53,362 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:53,535 INFO L93 Difference]: Finished difference Result 481 states and 1418 transitions. [2021-08-21 12:19:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:53,536 INFO L225 Difference]: With dead ends: 481 [2021-08-21 12:19:53,536 INFO L226 Difference]: Without dead ends: 466 [2021-08-21 12:19:53,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-08-21 12:19:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 327. [2021-08-21 12:19:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-08-21 12:19:53,540 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-08-21 12:19:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:53,540 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-08-21 12:19:53,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-08-21 12:19:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:53,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:53,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:53,569 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 12:19:53,748 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,SelfDestructingSolverStorable139 [2021-08-21 12:19:53,749 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1295514809, now seen corresponding path program 129 times [2021-08-21 12:19:53,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:53,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563299748] [2021-08-21 12:19:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:53,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:53,879 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 12:19:53,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:53,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563299748] [2021-08-21 12:19:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563299748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:53,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395125095] [2021-08-21 12:19:53,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:53,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:53,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:53,880 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 12:19:53,881 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 12:19:56,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:19:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:56,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:56,603 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 19 treesize of output 15 [2021-08-21 12:19:56,654 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 21 treesize of output 17 [2021-08-21 12:19:56,694 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 12:19:56,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395125095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:56,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:56,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:19:56,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912268151] [2021-08-21 12:19:56,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:19:56,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:19:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:19:56,695 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:56,915 INFO L93 Difference]: Finished difference Result 518 states and 1531 transitions. [2021-08-21 12:19:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:19:56,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:19:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:56,916 INFO L225 Difference]: With dead ends: 518 [2021-08-21 12:19:56,916 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 12:19:56,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:19:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 12:19:56,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 339. [2021-08-21 12:19:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2021-08-21 12:19:56,920 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2021-08-21 12:19:56,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:56,920 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2021-08-21 12:19:56,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2021-08-21 12:19:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:19:56,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:56,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:56,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:57,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:57,129 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -290293713, now seen corresponding path program 130 times [2021-08-21 12:19:57,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:57,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350835382] [2021-08-21 12:19:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:57,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:57,259 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 12:19:57,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:57,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350835382] [2021-08-21 12:19:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350835382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:57,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062655] [2021-08-21 12:19:57,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:57,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:57,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:57,261 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 12:19:57,262 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 12:19:59,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:59,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:19:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:00,022 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 19 treesize of output 15 [2021-08-21 12:20:00,049 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 21 treesize of output 17 [2021-08-21 12:20:00,126 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 12:20:00,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:00,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:00,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:20:00,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628519436] [2021-08-21 12:20:00,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:00,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:00,127 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:00,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:00,345 INFO L93 Difference]: Finished difference Result 489 states and 1441 transitions. [2021-08-21 12:20:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:00,346 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:20:00,346 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:20:00,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:20:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:20:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 337. [2021-08-21 12:20:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.994047619047619) internal successors, (1006), 336 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1006 transitions. [2021-08-21 12:20:00,350 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1006 transitions. Word has length 20 [2021-08-21 12:20:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:00,350 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1006 transitions. [2021-08-21 12:20:00,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1006 transitions. [2021-08-21 12:20:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:00,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:00,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:00,377 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 12:20:00,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:00,557 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash 297451609, now seen corresponding path program 131 times [2021-08-21 12:20:00,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:00,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508506181] [2021-08-21 12:20:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:00,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:00,713 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 12:20:00,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:00,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508506181] [2021-08-21 12:20:00,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508506181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:00,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965543934] [2021-08-21 12:20:00,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:20:00,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:00,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:00,715 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 12:20:00,715 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 12:20:03,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:20:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:03,501 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 19 treesize of output 15 [2021-08-21 12:20:03,522 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 21 treesize of output 17 [2021-08-21 12:20:03,596 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 12:20:03,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965543934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:03,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:03,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:20:03,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331831799] [2021-08-21 12:20:03,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:03,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:03,597 INFO L87 Difference]: Start difference. First operand 337 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:03,835 INFO L93 Difference]: Finished difference Result 484 states and 1435 transitions. [2021-08-21 12:20:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:03,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:03,836 INFO L225 Difference]: With dead ends: 484 [2021-08-21 12:20:03,836 INFO L226 Difference]: Without dead ends: 469 [2021-08-21 12:20:03,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-21 12:20:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 335. [2021-08-21 12:20:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.997005988023952) internal successors, (1001), 334 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1001 transitions. [2021-08-21 12:20:03,840 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1001 transitions. Word has length 20 [2021-08-21 12:20:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:03,841 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1001 transitions. [2021-08-21 12:20:03,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1001 transitions. [2021-08-21 12:20:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:03,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:03,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:03,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:04,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:04,042 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1031245811, now seen corresponding path program 132 times [2021-08-21 12:20:04,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:04,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487406724] [2021-08-21 12:20:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:04,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:04,164 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 12:20:04,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:04,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487406724] [2021-08-21 12:20:04,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487406724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:04,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753752739] [2021-08-21 12:20:04,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:04,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:04,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:04,166 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 12:20:04,167 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 12:20:06,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:20:06,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:06,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:06,260 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 19 treesize of output 15 [2021-08-21 12:20:06,285 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 21 treesize of output 17 [2021-08-21 12:20:06,349 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 12:20:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753752739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:06,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:06,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:20:06,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694540002] [2021-08-21 12:20:06,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:06,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:06,350 INFO L87 Difference]: Start difference. First operand 335 states and 1001 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 12:20:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:06,536 INFO L93 Difference]: Finished difference Result 572 states and 1694 transitions. [2021-08-21 12:20:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:06,537 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 20 [2021-08-21 12:20:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:06,538 INFO L225 Difference]: With dead ends: 572 [2021-08-21 12:20:06,538 INFO L226 Difference]: Without dead ends: 557 [2021-08-21 12:20:06,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-21 12:20:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 333. [2021-08-21 12:20:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2021-08-21 12:20:06,542 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 20 [2021-08-21 12:20:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:06,542 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2021-08-21 12:20:06,543 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 12:20:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2021-08-21 12:20:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:06,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:06,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:06,592 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 12:20:06,760 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,SelfDestructingSolverStorable143 [2021-08-21 12:20:06,761 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1485616967, now seen corresponding path program 133 times [2021-08-21 12:20:06,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:06,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644064201] [2021-08-21 12:20:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:06,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:06,931 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 12:20:06,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:06,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644064201] [2021-08-21 12:20:06,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644064201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:06,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596188131] [2021-08-21 12:20:06,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:06,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:06,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:06,932 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 12:20:06,933 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 12:20:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:09,777 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:09,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:20:09,890 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:09,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:20:09,897 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:09,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:20:09,972 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 12:20:09,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596188131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:09,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:09,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:09,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826134885] [2021-08-21 12:20:09,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:09,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:09,973 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:10,343 INFO L93 Difference]: Finished difference Result 549 states and 1618 transitions. [2021-08-21 12:20:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:20:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:10,344 INFO L225 Difference]: With dead ends: 549 [2021-08-21 12:20:10,344 INFO L226 Difference]: Without dead ends: 534 [2021-08-21 12:20:10,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:20:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-21 12:20:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 337. [2021-08-21 12:20:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0029761904761907) internal successors, (1009), 336 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1009 transitions. [2021-08-21 12:20:10,349 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1009 transitions. Word has length 20 [2021-08-21 12:20:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:10,349 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1009 transitions. [2021-08-21 12:20:10,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1009 transitions. [2021-08-21 12:20:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:10,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:10,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:10,373 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 12:20:10,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 12:20:10,558 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1200016491, now seen corresponding path program 134 times [2021-08-21 12:20:10,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:10,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880995221] [2021-08-21 12:20:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:10,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:10,735 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 12:20:10,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:10,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880995221] [2021-08-21 12:20:10,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880995221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:10,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588057821] [2021-08-21 12:20:10,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:10,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:10,745 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 12:20:10,745 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 12:20:13,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:13,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:13,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:13,636 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:13,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:20:13,685 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:13,685 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 42 treesize of output 41 [2021-08-21 12:20:13,692 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:13,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:20:13,817 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 12:20:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588057821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:13,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:13,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:13,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740460315] [2021-08-21 12:20:13,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:13,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:13,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:13,818 INFO L87 Difference]: Start difference. First operand 337 states and 1009 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:14,175 INFO L93 Difference]: Finished difference Result 550 states and 1623 transitions. [2021-08-21 12:20:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:20:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:14,176 INFO L225 Difference]: With dead ends: 550 [2021-08-21 12:20:14,176 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 12:20:14,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:20:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 12:20:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 336. [2021-08-21 12:20:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-08-21 12:20:14,180 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-08-21 12:20:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:14,180 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-08-21 12:20:14,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-08-21 12:20:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:14,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:14,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:14,208 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 12:20:14,400 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,SelfDestructingSolverStorable145 [2021-08-21 12:20:14,400 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1508518055, now seen corresponding path program 135 times [2021-08-21 12:20:14,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:14,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67925870] [2021-08-21 12:20:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:14,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:14,581 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 12:20:14,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:14,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67925870] [2021-08-21 12:20:14,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67925870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:14,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063534153] [2021-08-21 12:20:14,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:20:14,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:14,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:14,583 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 12:20:14,584 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 12:20:17,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:20:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:17,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:17,457 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:17,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:20:17,636 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:17,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:20:17,642 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:17,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 25 [2021-08-21 12:20:17,727 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 12:20:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063534153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:17,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:17,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:17,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922647770] [2021-08-21 12:20:17,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:17,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:17,728 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:18,214 INFO L93 Difference]: Finished difference Result 566 states and 1667 transitions. [2021-08-21 12:20:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:20:18,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:18,215 INFO L225 Difference]: With dead ends: 566 [2021-08-21 12:20:18,215 INFO L226 Difference]: Without dead ends: 551 [2021-08-21 12:20:18,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:20:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-21 12:20:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 339. [2021-08-21 12:20:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0059171597633134) internal successors, (1016), 338 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1016 transitions. [2021-08-21 12:20:18,219 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1016 transitions. Word has length 20 [2021-08-21 12:20:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:18,220 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1016 transitions. [2021-08-21 12:20:18,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1016 transitions. [2021-08-21 12:20:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:18,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:18,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:18,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:18,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 12:20:18,421 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash -912412139, now seen corresponding path program 136 times [2021-08-21 12:20:18,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:18,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563321221] [2021-08-21 12:20:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:18,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:18,550 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 12:20:18,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:18,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563321221] [2021-08-21 12:20:18,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563321221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:18,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710916066] [2021-08-21 12:20:18,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:20:18,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:18,551 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 12:20:18,552 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 12:20:21,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:20:21,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:21,500 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 19 treesize of output 15 [2021-08-21 12:20:21,527 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 21 treesize of output 17 [2021-08-21 12:20:21,589 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 12:20:21,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710916066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:21,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:21,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:20:21,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383638138] [2021-08-21 12:20:21,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:20:21,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:20:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:20:21,590 INFO L87 Difference]: Start difference. First operand 339 states and 1016 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:20:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:21,740 INFO L93 Difference]: Finished difference Result 446 states and 1316 transitions. [2021-08-21 12:20:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:20:21,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 20 [2021-08-21 12:20:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:21,742 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:20:21,742 INFO L226 Difference]: Without dead ends: 431 [2021-08-21 12:20:21,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:20:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-21 12:20:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 335. [2021-08-21 12:20:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9940119760479043) internal successors, (1000), 334 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1000 transitions. [2021-08-21 12:20:21,746 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1000 transitions. Word has length 20 [2021-08-21 12:20:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:21,746 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1000 transitions. [2021-08-21 12:20:21,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 12:20:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1000 transitions. [2021-08-21 12:20:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:21,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:21,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:21,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:21,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 12:20:21,957 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1717649673, now seen corresponding path program 137 times [2021-08-21 12:20:21,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:21,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479979293] [2021-08-21 12:20:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:21,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:22,082 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 12:20:22,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:22,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479979293] [2021-08-21 12:20:22,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479979293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:22,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555985762] [2021-08-21 12:20:22,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:20:22,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:22,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:22,083 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 12:20:22,084 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 12:20:25,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:25,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:25,038 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 19 treesize of output 15 [2021-08-21 12:20:25,077 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 21 treesize of output 17 [2021-08-21 12:20:25,142 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 12:20:25,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555985762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:25,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:25,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:20:25,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497679818] [2021-08-21 12:20:25,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:25,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:25,143 INFO L87 Difference]: Start difference. First operand 335 states and 1000 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 12:20:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:25,346 INFO L93 Difference]: Finished difference Result 597 states and 1755 transitions. [2021-08-21 12:20:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:25,346 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 20 [2021-08-21 12:20:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:25,347 INFO L225 Difference]: With dead ends: 597 [2021-08-21 12:20:25,347 INFO L226 Difference]: Without dead ends: 582 [2021-08-21 12:20:25,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-08-21 12:20:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 334. [2021-08-21 12:20:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.990990990990991) internal successors, (996), 333 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 996 transitions. [2021-08-21 12:20:25,351 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 996 transitions. Word has length 20 [2021-08-21 12:20:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:25,351 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 996 transitions. [2021-08-21 12:20:25,351 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 12:20:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 996 transitions. [2021-08-21 12:20:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:25,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:25,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:25,376 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 12:20:25,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-21 12:20:25,561 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash -979752617, now seen corresponding path program 138 times [2021-08-21 12:20:25,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:25,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248172138] [2021-08-21 12:20:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:25,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:25,730 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 12:20:25,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:25,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248172138] [2021-08-21 12:20:25,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248172138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:25,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134678062] [2021-08-21 12:20:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:25,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:25,731 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 12:20:25,732 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 12:20:28,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:20:28,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:28,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:28,831 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:28,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:20:28,873 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:28,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:20:28,880 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:28,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 25 [2021-08-21 12:20:28,961 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 12:20:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134678062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:28,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:28,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:28,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113634517] [2021-08-21 12:20:28,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:28,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:28,962 INFO L87 Difference]: Start difference. First operand 334 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:29,244 INFO L93 Difference]: Finished difference Result 507 states and 1493 transitions. [2021-08-21 12:20:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:20:29,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:29,245 INFO L225 Difference]: With dead ends: 507 [2021-08-21 12:20:29,245 INFO L226 Difference]: Without dead ends: 492 [2021-08-21 12:20:29,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:20:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-21 12:20:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 334. [2021-08-21 12:20:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.990990990990991) internal successors, (996), 333 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 996 transitions. [2021-08-21 12:20:29,249 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 996 transitions. Word has length 20 [2021-08-21 12:20:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:29,249 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 996 transitions. [2021-08-21 12:20:29,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 996 transitions. [2021-08-21 12:20:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:29,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:29,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:29,274 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 12:20:29,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 12:20:29,457 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:29,457 INFO L82 PathProgramCache]: Analyzing trace with hash -392007295, now seen corresponding path program 139 times [2021-08-21 12:20:29,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:29,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958870172] [2021-08-21 12:20:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:29,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:29,601 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 12:20:29,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:29,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958870172] [2021-08-21 12:20:29,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958870172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:29,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427434092] [2021-08-21 12:20:29,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:29,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:29,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:29,602 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 12:20:29,603 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 12:20:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:32,607 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:32,608 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 35 treesize of output 34 [2021-08-21 12:20:32,669 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:32,669 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 37 treesize of output 36 [2021-08-21 12:20:32,676 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:32,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 25 [2021-08-21 12:20:32,753 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 12:20:32,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427434092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:32,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:32,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:32,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110157886] [2021-08-21 12:20:32,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:32,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:32,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:32,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:32,755 INFO L87 Difference]: Start difference. First operand 334 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:32,939 INFO L93 Difference]: Finished difference Result 450 states and 1332 transitions. [2021-08-21 12:20:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:32,940 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:20:32,940 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:20:32,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:20:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:20:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 332. [2021-08-21 12:20:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9939577039274923) internal successors, (991), 331 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 991 transitions. [2021-08-21 12:20:32,944 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 991 transitions. Word has length 20 [2021-08-21 12:20:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:32,944 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 991 transitions. [2021-08-21 12:20:32,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 991 transitions. [2021-08-21 12:20:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:32,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:32,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:32,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:33,145 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,SelfDestructingSolverStorable150 [2021-08-21 12:20:33,145 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash 319661595, now seen corresponding path program 140 times [2021-08-21 12:20:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:33,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320990990] [2021-08-21 12:20:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:33,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:33,326 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 12:20:33,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:33,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320990990] [2021-08-21 12:20:33,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320990990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:33,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241757423] [2021-08-21 12:20:33,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:33,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:33,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:33,327 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 12:20:33,328 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 12:20:36,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:36,307 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:36,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:20:36,433 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:36,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:20:36,439 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:36,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 25 [2021-08-21 12:20:36,521 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 12:20:36,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241757423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:36,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:36,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:36,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581272365] [2021-08-21 12:20:36,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:36,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:36,522 INFO L87 Difference]: Start difference. First operand 332 states and 991 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:36,832 INFO L93 Difference]: Finished difference Result 513 states and 1510 transitions. [2021-08-21 12:20:36,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:20:36,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:36,833 INFO L225 Difference]: With dead ends: 513 [2021-08-21 12:20:36,834 INFO L226 Difference]: Without dead ends: 498 [2021-08-21 12:20:36,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:20:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-21 12:20:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 330. [2021-08-21 12:20:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2021-08-21 12:20:36,838 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 20 [2021-08-21 12:20:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:36,838 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2021-08-21 12:20:36,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2021-08-21 12:20:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:36,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:36,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:36,864 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 12:20:37,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:37,049 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1751218665, now seen corresponding path program 141 times [2021-08-21 12:20:37,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:37,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639419116] [2021-08-21 12:20:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:37,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:37,225 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 12:20:37,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:37,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639419116] [2021-08-21 12:20:37,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639419116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:37,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73137354] [2021-08-21 12:20:37,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:20:37,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:37,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:37,227 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 12:20:37,227 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 12:20:40,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:20:40,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:40,170 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:40,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:20:40,217 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:40,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:20:40,223 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:20:40,344 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 12:20:40,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73137354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:40,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:40,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:40,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058722195] [2021-08-21 12:20:40,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:40,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:40,345 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:40,618 INFO L93 Difference]: Finished difference Result 511 states and 1503 transitions. [2021-08-21 12:20:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:20:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:40,619 INFO L225 Difference]: With dead ends: 511 [2021-08-21 12:20:40,619 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 12:20:40,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:20:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 12:20:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 329. [2021-08-21 12:20:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-08-21 12:20:40,623 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 20 [2021-08-21 12:20:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:40,623 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-08-21 12:20:40,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-08-21 12:20:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:40,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:40,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:40,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-21 12:20:40,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:40,832 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:40,832 INFO L82 PathProgramCache]: Analyzing trace with hash -164785915, now seen corresponding path program 142 times [2021-08-21 12:20:40,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:40,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976978929] [2021-08-21 12:20:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:40,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:41,028 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 12:20:41,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:41,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976978929] [2021-08-21 12:20:41,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976978929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:41,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335831352] [2021-08-21 12:20:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:20:41,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:41,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:41,030 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 12:20:41,030 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 12:20:43,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:20:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:44,011 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:44,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:20:44,162 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:20:44,166 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:44,167 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 26 treesize of output 25 [2021-08-21 12:20:44,229 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 12:20:44,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335831352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:44,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:44,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:44,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640800943] [2021-08-21 12:20:44,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:44,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:44,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:44,230 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:44,432 INFO L93 Difference]: Finished difference Result 465 states and 1365 transitions. [2021-08-21 12:20:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:44,433 INFO L225 Difference]: With dead ends: 465 [2021-08-21 12:20:44,433 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 12:20:44,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:20:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 12:20:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 332. [2021-08-21 12:20:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9939577039274923) internal successors, (991), 331 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 991 transitions. [2021-08-21 12:20:44,437 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 991 transitions. Word has length 20 [2021-08-21 12:20:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:44,437 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 991 transitions. [2021-08-21 12:20:44,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 991 transitions. [2021-08-21 12:20:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:44,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:44,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:44,462 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 12:20:44,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:44,653 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 431320001, now seen corresponding path program 143 times [2021-08-21 12:20:44,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:44,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290709645] [2021-08-21 12:20:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:44,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:44,749 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 12:20:44,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:44,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290709645] [2021-08-21 12:20:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290709645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:44,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848052478] [2021-08-21 12:20:44,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:20:44,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:44,750 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 12:20:44,778 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 12:20:47,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:47,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:47,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:47,751 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:47,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:20:47,805 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:47,805 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 42 treesize of output 41 [2021-08-21 12:20:47,810 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:47,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:20:47,866 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 12:20:47,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848052478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:47,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:47,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:20:47,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472194649] [2021-08-21 12:20:47,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:20:47,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:47,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:20:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:20:47,867 INFO L87 Difference]: Start difference. First operand 332 states and 991 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:48,005 INFO L93 Difference]: Finished difference Result 407 states and 1196 transitions. [2021-08-21 12:20:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:20:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:48,006 INFO L225 Difference]: With dead ends: 407 [2021-08-21 12:20:48,006 INFO L226 Difference]: Without dead ends: 392 [2021-08-21 12:20:48,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:20:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-21 12:20:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 328. [2021-08-21 12:20:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-08-21 12:20:48,010 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-08-21 12:20:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:48,010 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-08-21 12:20:48,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-08-21 12:20:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:48,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:48,011 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:48,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-21 12:20:48,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:48,221 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash -480096617, now seen corresponding path program 144 times [2021-08-21 12:20:48,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:48,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106209165] [2021-08-21 12:20:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:48,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:48,366 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 12:20:48,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:48,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106209165] [2021-08-21 12:20:48,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106209165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:48,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278463801] [2021-08-21 12:20:48,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:48,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:48,367 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 12:20:48,368 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 12:20:51,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:20:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:51,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:51,386 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:51,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:20:51,544 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:51,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:20:51,549 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:51,549 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:20:51,582 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 12:20:51,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278463801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:51,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:51,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:51,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711450121] [2021-08-21 12:20:51,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:51,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:51,582 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:51,785 INFO L93 Difference]: Finished difference Result 486 states and 1435 transitions. [2021-08-21 12:20:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:20:51,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:51,786 INFO L225 Difference]: With dead ends: 486 [2021-08-21 12:20:51,786 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 12:20:51,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:20:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 12:20:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 338. [2021-08-21 12:20:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-08-21 12:20:51,790 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 20 [2021-08-21 12:20:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:51,790 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-08-21 12:20:51,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-08-21 12:20:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:51,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:51,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:51,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:52,000 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,SelfDestructingSolverStorable155 [2021-08-21 12:20:52,001 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2065905139, now seen corresponding path program 145 times [2021-08-21 12:20:52,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:52,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47167249] [2021-08-21 12:20:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:52,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:52,119 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 12:20:52,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:52,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47167249] [2021-08-21 12:20:52,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47167249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:52,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111127920] [2021-08-21 12:20:52,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:52,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:52,120 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 12:20:52,121 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 12:20:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:54,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:54,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:54,879 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:54,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:20:54,982 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:54,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:20:54,987 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:54,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:20:55,021 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 12:20:55,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111127920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:55,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:55,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:20:55,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057258188] [2021-08-21 12:20:55,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:55,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:55,022 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:20:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:55,188 INFO L93 Difference]: Finished difference Result 405 states and 1191 transitions. [2021-08-21 12:20:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:20:55,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:55,189 INFO L225 Difference]: With dead ends: 405 [2021-08-21 12:20:55,189 INFO L226 Difference]: Without dead ends: 390 [2021-08-21 12:20:55,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-21 12:20:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 336. [2021-08-21 12:20:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.994029850746269) internal successors, (1003), 335 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1003 transitions. [2021-08-21 12:20:55,193 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1003 transitions. Word has length 20 [2021-08-21 12:20:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:55,193 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1003 transitions. [2021-08-21 12:20:55,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:20:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1003 transitions. [2021-08-21 12:20:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:55,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:55,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:55,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:55,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:55,405 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1767515735, now seen corresponding path program 146 times [2021-08-21 12:20:55,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:55,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927419780] [2021-08-21 12:20:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:55,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:55,551 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 12:20:55,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:55,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927419780] [2021-08-21 12:20:55,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927419780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:55,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107639658] [2021-08-21 12:20:55,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:55,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:55,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:55,552 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 12:20:55,553 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 12:20:58,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:20:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:58,685 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:58,685 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 30 treesize of output 29 [2021-08-21 12:20:58,812 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:58,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:20:58,817 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:58,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:20:58,890 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 12:20:58,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107639658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:58,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:58,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:20:58,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389038854] [2021-08-21 12:20:58,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:20:58,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:20:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:20:58,891 INFO L87 Difference]: Start difference. First operand 336 states and 1003 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:59,111 INFO L93 Difference]: Finished difference Result 498 states and 1465 transitions. [2021-08-21 12:20:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:20:59,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:20:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:59,112 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:20:59,112 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:20:59,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:20:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:20:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 333. [2021-08-21 12:20:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9879518072289155) internal successors, (992), 332 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 992 transitions. [2021-08-21 12:20:59,116 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 992 transitions. Word has length 20 [2021-08-21 12:20:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:59,116 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 992 transitions. [2021-08-21 12:20:59,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 992 transitions. [2021-08-21 12:20:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:20:59,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:59,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:59,143 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 12:20:59,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 12:20:59,325 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:59,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:59,325 INFO L82 PathProgramCache]: Analyzing trace with hash 158181897, now seen corresponding path program 147 times [2021-08-21 12:20:59,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:59,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496887548] [2021-08-21 12:20:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:59,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:59,490 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 12:20:59,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:59,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496887548] [2021-08-21 12:20:59,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496887548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:59,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969594996] [2021-08-21 12:20:59,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:20:59,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:59,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:59,513 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 12:20:59,513 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 12:21:02,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:21:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:02,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:02,627 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:02,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:21:02,677 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:02,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:21:02,684 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:02,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:21:02,803 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 12:21:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969594996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:02,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:02,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071007421] [2021-08-21 12:21:02,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:02,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:02,804 INFO L87 Difference]: Start difference. First operand 333 states and 992 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:03,017 INFO L93 Difference]: Finished difference Result 473 states and 1391 transitions. [2021-08-21 12:21:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:03,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:03,018 INFO L225 Difference]: With dead ends: 473 [2021-08-21 12:21:03,018 INFO L226 Difference]: Without dead ends: 458 [2021-08-21 12:21:03,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-21 12:21:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 332. [2021-08-21 12:21:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-08-21 12:21:03,022 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-08-21 12:21:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:03,022 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-08-21 12:21:03,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-08-21 12:21:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:03,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:03,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:03,050 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 12:21:03,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:21:03,223 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:03,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1812299891, now seen corresponding path program 148 times [2021-08-21 12:21:03,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:03,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530005937] [2021-08-21 12:21:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:03,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:03,376 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 12:21:03,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:03,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530005937] [2021-08-21 12:21:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530005937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:03,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133233283] [2021-08-21 12:21:03,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:03,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:03,378 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 12:21:03,378 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 12:21:06,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:06,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:06,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:06,282 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:06,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:21:06,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:06,328 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 42 treesize of output 41 [2021-08-21 12:21:06,334 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:06,334 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 27 treesize of output 26 [2021-08-21 12:21:06,407 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 12:21:06,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133233283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:06,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:06,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:06,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432060366] [2021-08-21 12:21:06,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:06,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:06,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:06,408 INFO L87 Difference]: Start difference. First operand 332 states and 987 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:06,562 INFO L93 Difference]: Finished difference Result 452 states and 1334 transitions. [2021-08-21 12:21:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:06,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:06,563 INFO L225 Difference]: With dead ends: 452 [2021-08-21 12:21:06,563 INFO L226 Difference]: Without dead ends: 437 [2021-08-21 12:21:06,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-21 12:21:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 329. [2021-08-21 12:21:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-08-21 12:21:06,567 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 20 [2021-08-21 12:21:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:06,567 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-08-21 12:21:06,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-08-21 12:21:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:06,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:06,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:06,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:06,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:06,777 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1848124801, now seen corresponding path program 149 times [2021-08-21 12:21:06,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:06,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718598810] [2021-08-21 12:21:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:06,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:06,938 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 12:21:06,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:06,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718598810] [2021-08-21 12:21:06,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718598810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:06,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337860282] [2021-08-21 12:21:06,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:06,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:06,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:06,940 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 12:21:06,940 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 12:21:10,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:21:10,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:10,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:10,217 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:10,218 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 30 treesize of output 29 [2021-08-21 12:21:10,268 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:10,269 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-08-21 12:21:10,275 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:10,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:21:10,394 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 12:21:10,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337860282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:10,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:10,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:10,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145904693] [2021-08-21 12:21:10,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:10,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:10,395 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:10,602 INFO L93 Difference]: Finished difference Result 478 states and 1402 transitions. [2021-08-21 12:21:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:10,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:10,603 INFO L225 Difference]: With dead ends: 478 [2021-08-21 12:21:10,603 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 12:21:10,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 12:21:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 328. [2021-08-21 12:21:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-08-21 12:21:10,607 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-08-21 12:21:10,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:10,607 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-08-21 12:21:10,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-08-21 12:21:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:10,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:10,608 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:10,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:10,816 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,SelfDestructingSolverStorable160 [2021-08-21 12:21:10,817 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash 683836557, now seen corresponding path program 150 times [2021-08-21 12:21:10,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:10,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691412017] [2021-08-21 12:21:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:10,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:10,983 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 12:21:10,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:10,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691412017] [2021-08-21 12:21:10,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691412017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:10,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994658722] [2021-08-21 12:21:10,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:21:10,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:10,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:10,984 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 12:21:10,985 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 12:21:14,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:21:14,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:14,208 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:14,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:21:14,395 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:14,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:21:14,401 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:14,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:21:14,482 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 12:21:14,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994658722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:14,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:14,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:14,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058213684] [2021-08-21 12:21:14,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:14,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:14,483 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:14,656 INFO L93 Difference]: Finished difference Result 447 states and 1320 transitions. [2021-08-21 12:21:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:14,657 INFO L225 Difference]: With dead ends: 447 [2021-08-21 12:21:14,657 INFO L226 Difference]: Without dead ends: 432 [2021-08-21 12:21:14,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-21 12:21:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 334. [2021-08-21 12:21:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.990990990990991) internal successors, (996), 333 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 996 transitions. [2021-08-21 12:21:14,661 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 996 transitions. Word has length 20 [2021-08-21 12:21:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:14,661 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 996 transitions. [2021-08-21 12:21:14,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 996 transitions. [2021-08-21 12:21:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:14,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:14,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:14,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:14,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:14,869 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1279942473, now seen corresponding path program 151 times [2021-08-21 12:21:14,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:14,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214243161] [2021-08-21 12:21:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:14,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:15,046 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 12:21:15,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:15,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214243161] [2021-08-21 12:21:15,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214243161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:15,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822444092] [2021-08-21 12:21:15,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:21:15,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:15,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:15,047 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 12:21:15,048 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 12:21:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:18,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:18,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:18,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:21:18,401 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:18,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 44 [2021-08-21 12:21:18,408 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:18,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:21:18,530 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 12:21:18,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822444092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:18,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:18,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:18,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736438838] [2021-08-21 12:21:18,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:18,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:18,531 INFO L87 Difference]: Start difference. First operand 334 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:18,710 INFO L93 Difference]: Finished difference Result 459 states and 1350 transitions. [2021-08-21 12:21:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:18,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:18,711 INFO L225 Difference]: With dead ends: 459 [2021-08-21 12:21:18,711 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 12:21:18,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 12:21:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 331. [2021-08-21 12:21:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.981818181818182) internal successors, (984), 330 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 984 transitions. [2021-08-21 12:21:18,714 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 984 transitions. Word has length 20 [2021-08-21 12:21:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:18,714 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 984 transitions. [2021-08-21 12:21:18,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 984 transitions. [2021-08-21 12:21:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:18,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:18,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:18,741 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 12:21:18,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:18,925 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:18,925 INFO L82 PathProgramCache]: Analyzing trace with hash 787346711, now seen corresponding path program 152 times [2021-08-21 12:21:18,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:18,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132290721] [2021-08-21 12:21:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:18,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:19,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:19,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132290721] [2021-08-21 12:21:19,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132290721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:19,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937536446] [2021-08-21 12:21:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:21:19,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:19,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:19,102 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 12:21:19,103 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 12:21:22,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:22,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:22,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:22,494 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:22,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:21:22,539 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:22,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 38 [2021-08-21 12:21:22,545 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:21:22,653 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 12:21:22,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937536446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:22,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:22,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:22,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862361414] [2021-08-21 12:21:22,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:22,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:22,654 INFO L87 Difference]: Start difference. First operand 331 states and 984 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:22,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:22,878 INFO L93 Difference]: Finished difference Result 451 states and 1331 transitions. [2021-08-21 12:21:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:22,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:22,879 INFO L225 Difference]: With dead ends: 451 [2021-08-21 12:21:22,879 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:21:22,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:21:22,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 327. [2021-08-21 12:21:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-08-21 12:21:22,883 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-08-21 12:21:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:22,883 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-08-21 12:21:22,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-08-21 12:21:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:22,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:22,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:22,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:23,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:23,086 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2039824767, now seen corresponding path program 153 times [2021-08-21 12:21:23,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:23,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331604437] [2021-08-21 12:21:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:23,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:23,209 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 12:21:23,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:23,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331604437] [2021-08-21 12:21:23,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331604437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:23,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386593958] [2021-08-21 12:21:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:23,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:23,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:23,210 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 12:21:23,211 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 12:21:26,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:21:26,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:26,542 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 19 treesize of output 15 [2021-08-21 12:21:26,579 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 21 treesize of output 17 [2021-08-21 12:21:26,636 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 12:21:26,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386593958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:26,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:26,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:21:26,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178868609] [2021-08-21 12:21:26,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:26,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:26,637 INFO L87 Difference]: Start difference. First operand 327 states and 972 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 12:21:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:26,797 INFO L93 Difference]: Finished difference Result 569 states and 1678 transitions. [2021-08-21 12:21:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:26,797 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 20 [2021-08-21 12:21:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:26,798 INFO L225 Difference]: With dead ends: 569 [2021-08-21 12:21:26,798 INFO L226 Difference]: Without dead ends: 554 [2021-08-21 12:21:26,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-08-21 12:21:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 330. [2021-08-21 12:21:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-08-21 12:21:26,802 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-08-21 12:21:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:26,802 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-08-21 12:21:26,802 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 12:21:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-08-21 12:21:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:26,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:26,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:26,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:27,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:27,029 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:27,029 INFO L82 PathProgramCache]: Analyzing trace with hash -122402727, now seen corresponding path program 154 times [2021-08-21 12:21:27,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:27,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026328266] [2021-08-21 12:21:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:27,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:27,159 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 12:21:27,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:27,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026328266] [2021-08-21 12:21:27,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026328266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:27,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887302979] [2021-08-21 12:21:27,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:27,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:27,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:27,160 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 12:21:27,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:21:30,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:30,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:30,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:30,475 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 19 treesize of output 15 [2021-08-21 12:21:30,537 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 21 treesize of output 17 [2021-08-21 12:21:30,615 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 12:21:30,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887302979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:30,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:30,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:21:30,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985741233] [2021-08-21 12:21:30,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:30,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:30,616 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:30,843 INFO L93 Difference]: Finished difference Result 482 states and 1423 transitions. [2021-08-21 12:21:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:30,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:30,844 INFO L225 Difference]: With dead ends: 482 [2021-08-21 12:21:30,844 INFO L226 Difference]: Without dead ends: 467 [2021-08-21 12:21:30,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-21 12:21:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 336. [2021-08-21 12:21:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.991044776119403) internal successors, (1002), 335 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1002 transitions. [2021-08-21 12:21:30,848 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1002 transitions. Word has length 20 [2021-08-21 12:21:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:30,848 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1002 transitions. [2021-08-21 12:21:30,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1002 transitions. [2021-08-21 12:21:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:30,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:30,849 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:30,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:31,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:31,049 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:31,050 INFO L82 PathProgramCache]: Analyzing trace with hash 473703189, now seen corresponding path program 155 times [2021-08-21 12:21:31,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:31,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317798199] [2021-08-21 12:21:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:31,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:31,208 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 12:21:31,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:31,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317798199] [2021-08-21 12:21:31,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317798199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:31,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148819939] [2021-08-21 12:21:31,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:31,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:31,209 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:31,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:21:34,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:21:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:34,456 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 19 treesize of output 15 [2021-08-21 12:21:34,486 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 21 treesize of output 17 [2021-08-21 12:21:34,601 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 12:21:34,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148819939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:34,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:34,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:21:34,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669632868] [2021-08-21 12:21:34,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:34,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:34,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:34,602 INFO L87 Difference]: Start difference. First operand 336 states and 1002 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:34,841 INFO L93 Difference]: Finished difference Result 494 states and 1453 transitions. [2021-08-21 12:21:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:34,842 INFO L225 Difference]: With dead ends: 494 [2021-08-21 12:21:34,842 INFO L226 Difference]: Without dead ends: 479 [2021-08-21 12:21:34,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-21 12:21:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 333. [2021-08-21 12:21:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9819277108433737) internal successors, (990), 332 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 990 transitions. [2021-08-21 12:21:34,846 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 990 transitions. Word has length 20 [2021-08-21 12:21:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:34,846 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 990 transitions. [2021-08-21 12:21:34,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 990 transitions. [2021-08-21 12:21:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:34,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:34,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:34,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:35,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:35,057 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash -18892573, now seen corresponding path program 156 times [2021-08-21 12:21:35,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:35,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866289282] [2021-08-21 12:21:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:35,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:35,204 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 12:21:35,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:35,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866289282] [2021-08-21 12:21:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866289282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:35,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559073002] [2021-08-21 12:21:35,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:21:35,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:35,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:35,206 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:35,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:21:38,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:21:38,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:38,469 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 19 treesize of output 15 [2021-08-21 12:21:38,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:21:38,576 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 12:21:38,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559073002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:38,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:38,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:21:38,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667884088] [2021-08-21 12:21:38,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:38,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:38,577 INFO L87 Difference]: Start difference. First operand 333 states and 990 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:38,751 INFO L93 Difference]: Finished difference Result 486 states and 1434 transitions. [2021-08-21 12:21:38,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:38,752 INFO L225 Difference]: With dead ends: 486 [2021-08-21 12:21:38,752 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 12:21:38,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 12:21:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 326. [2021-08-21 12:21:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-08-21 12:21:38,756 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-08-21 12:21:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:38,756 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-08-21 12:21:38,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-08-21 12:21:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:38,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:38,756 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:38,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:38,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 12:21:38,973 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:38,973 INFO L82 PathProgramCache]: Analyzing trace with hash -429125391, now seen corresponding path program 157 times [2021-08-21 12:21:38,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:38,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301508514] [2021-08-21 12:21:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:38,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:39,083 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 12:21:39,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:39,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301508514] [2021-08-21 12:21:39,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301508514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:39,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620272529] [2021-08-21 12:21:39,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:21:39,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:39,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:39,084 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:39,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 12:21:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:42,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:42,585 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:42,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:21:42,725 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:42,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:21:42,730 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:21:42,751 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 12:21:42,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620272529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:42,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:42,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:21:42,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155528847] [2021-08-21 12:21:42,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:21:42,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:21:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:42,752 INFO L87 Difference]: Start difference. First operand 326 states and 969 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 12:21:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:42,889 INFO L93 Difference]: Finished difference Result 394 states and 1163 transitions. [2021-08-21 12:21:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:21:42,889 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 20 [2021-08-21 12:21:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:42,890 INFO L225 Difference]: With dead ends: 394 [2021-08-21 12:21:42,890 INFO L226 Difference]: Without dead ends: 379 [2021-08-21 12:21:42,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-21 12:21:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 331. [2021-08-21 12:21:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-08-21 12:21:42,893 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 20 [2021-08-21 12:21:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:42,893 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-08-21 12:21:42,893 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 12:21:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-08-21 12:21:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:42,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:42,894 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:42,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:43,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 12:21:43,094 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2014933913, now seen corresponding path program 158 times [2021-08-21 12:21:43,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:43,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271108401] [2021-08-21 12:21:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:43,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:43,295 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 12:21:43,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:43,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271108401] [2021-08-21 12:21:43,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271108401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:43,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618819368] [2021-08-21 12:21:43,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:21:43,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:43,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:43,296 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:43,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 12:21:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:46,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:46,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:46,704 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:46,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:21:46,748 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:46,749 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-08-21 12:21:46,754 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:46,755 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 27 treesize of output 26 [2021-08-21 12:21:46,836 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 12:21:46,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618819368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:46,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:46,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:46,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155893829] [2021-08-21 12:21:46,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:46,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:46,837 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:47,198 INFO L93 Difference]: Finished difference Result 498 states and 1466 transitions. [2021-08-21 12:21:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:21:47,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:47,199 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:21:47,199 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:21:47,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:21:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:21:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 329. [2021-08-21 12:21:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:21:47,203 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:21:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:47,203 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:21:47,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:21:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:47,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:47,204 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:47,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:47,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 12:21:47,416 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:47,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1427188591, now seen corresponding path program 159 times [2021-08-21 12:21:47,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:47,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929157888] [2021-08-21 12:21:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:47,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:47,655 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 12:21:47,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:47,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929157888] [2021-08-21 12:21:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929157888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:47,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996783445] [2021-08-21 12:21:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:47,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:47,657 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:47,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 12:21:51,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:21:51,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:21:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:51,231 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:51,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 47 [2021-08-21 12:21:51,321 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:51,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 64 [2021-08-21 12:21:51,327 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:51,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 treesize of output 48 [2021-08-21 12:21:51,521 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 12:21:51,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996783445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:51,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:51,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:51,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740141870] [2021-08-21 12:21:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:51,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:51,522 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:51,854 INFO L93 Difference]: Finished difference Result 466 states and 1377 transitions. [2021-08-21 12:21:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:21:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:51,855 INFO L225 Difference]: With dead ends: 466 [2021-08-21 12:21:51,855 INFO L226 Difference]: Without dead ends: 451 [2021-08-21 12:21:51,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:21:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-21 12:21:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 327. [2021-08-21 12:21:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-08-21 12:21:51,859 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-08-21 12:21:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:51,860 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-08-21 12:21:51,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-08-21 12:21:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:51,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:51,860 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:51,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:52,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:52,061 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash 870288821, now seen corresponding path program 160 times [2021-08-21 12:21:52,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:52,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794789567] [2021-08-21 12:21:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:52,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:52,225 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 12:21:52,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:52,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794789567] [2021-08-21 12:21:52,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794789567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:52,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620672862] [2021-08-21 12:21:52,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:52,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:52,226 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:52,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 12:21:55,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:55,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:55,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:21:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:55,664 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:55,664 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 30 treesize of output 29 [2021-08-21 12:21:55,913 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:55,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:21:55,919 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:55,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:21:55,964 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 12:21:55,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620672862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:55,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:55,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:21:55,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789714195] [2021-08-21 12:21:55,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:21:55,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:21:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:55,965 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:56,328 INFO L93 Difference]: Finished difference Result 512 states and 1503 transitions. [2021-08-21 12:21:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:21:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:21:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:56,329 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:21:56,329 INFO L226 Difference]: Without dead ends: 497 [2021-08-21 12:21:56,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:21:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-21 12:21:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 333. [2021-08-21 12:21:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2021-08-21 12:21:56,333 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 20 [2021-08-21 12:21:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:56,333 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2021-08-21 12:21:56,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2021-08-21 12:21:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:21:56,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:56,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:56,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-21 12:21:56,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:56,553 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash -715519701, now seen corresponding path program 161 times [2021-08-21 12:21:56,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:56,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664068261] [2021-08-21 12:21:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:56,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:56,719 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 12:21:56,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:56,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664068261] [2021-08-21 12:21:56,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664068261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:56,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056195724] [2021-08-21 12:21:56,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:56,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:56,720 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:56,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 12:22:00,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:00,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:00,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:00,153 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:00,153 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-08-21 12:22:00,261 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:00,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:22:00,268 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:00,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:22:00,351 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 12:22:00,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056195724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:00,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:00,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:00,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585055662] [2021-08-21 12:22:00,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:00,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:00,352 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:00,748 INFO L93 Difference]: Finished difference Result 506 states and 1490 transitions. [2021-08-21 12:22:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:22:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:00,749 INFO L225 Difference]: With dead ends: 506 [2021-08-21 12:22:00,749 INFO L226 Difference]: Without dead ends: 491 [2021-08-21 12:22:00,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:22:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-21 12:22:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 331. [2021-08-21 12:22:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.996969696969697) internal successors, (989), 330 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 989 transitions. [2021-08-21 12:22:00,753 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 989 transitions. Word has length 20 [2021-08-21 12:22:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:00,754 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 989 transitions. [2021-08-21 12:22:00,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 989 transitions. [2021-08-21 12:22:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:00,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:00,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:00,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:00,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-21 12:22:00,963 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1177066123, now seen corresponding path program 162 times [2021-08-21 12:22:00,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:00,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31428930] [2021-08-21 12:22:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:00,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:01,187 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 12:22:01,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:01,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31428930] [2021-08-21 12:22:01,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31428930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:01,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803303169] [2021-08-21 12:22:01,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:01,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:01,188 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:01,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 12:22:04,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:22:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:04,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:04,661 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:04,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:22:04,846 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:04,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:22:04,852 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:04,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-21 12:22:04,934 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 12:22:04,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803303169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:04,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:04,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:04,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811196411] [2021-08-21 12:22:04,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:04,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:04,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:04,935 INFO L87 Difference]: Start difference. First operand 331 states and 989 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:05,238 INFO L93 Difference]: Finished difference Result 499 states and 1468 transitions. [2021-08-21 12:22:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:22:05,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:05,239 INFO L225 Difference]: With dead ends: 499 [2021-08-21 12:22:05,239 INFO L226 Difference]: Without dead ends: 484 [2021-08-21 12:22:05,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-21 12:22:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 328. [2021-08-21 12:22:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9908256880733943) internal successors, (978), 327 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 978 transitions. [2021-08-21 12:22:05,243 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 978 transitions. Word has length 20 [2021-08-21 12:22:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:05,243 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 978 transitions. [2021-08-21 12:22:05,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 978 transitions. [2021-08-21 12:22:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:05,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:05,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:05,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:05,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:05,444 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1508567335, now seen corresponding path program 163 times [2021-08-21 12:22:05,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:05,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286333560] [2021-08-21 12:22:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:05,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:05,621 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 12:22:05,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:05,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286333560] [2021-08-21 12:22:05,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286333560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:05,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23096509] [2021-08-21 12:22:05,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:05,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:05,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:05,622 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:05,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 12:22:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:09,094 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:09,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:22:09,145 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:22:09,151 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:09,151 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-08-21 12:22:09,268 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 12:22:09,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23096509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:09,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:09,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:09,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046689581] [2021-08-21 12:22:09,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:09,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:09,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:09,269 INFO L87 Difference]: Start difference. First operand 328 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:09,638 INFO L93 Difference]: Finished difference Result 514 states and 1512 transitions. [2021-08-21 12:22:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:22:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:09,639 INFO L225 Difference]: With dead ends: 514 [2021-08-21 12:22:09,639 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 12:22:09,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:22:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 12:22:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 327. [2021-08-21 12:22:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-08-21 12:22:09,643 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-08-21 12:22:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:09,643 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-08-21 12:22:09,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-08-21 12:22:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:09,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:09,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:09,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:09,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:09,853 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1199967211, now seen corresponding path program 164 times [2021-08-21 12:22:09,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:09,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162775065] [2021-08-21 12:22:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:09,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:10,020 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 12:22:10,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:10,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162775065] [2021-08-21 12:22:10,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162775065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:10,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261636462] [2021-08-21 12:22:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:22:10,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:10,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:10,022 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:10,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 12:22:13,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:13,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:13,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:13,459 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:13,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:22:13,561 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:13,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:22:13,566 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:22:13,638 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 12:22:13,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261636462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:13,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:13,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:13,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502894859] [2021-08-21 12:22:13,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:13,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:13,639 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:13,969 INFO L93 Difference]: Finished difference Result 483 states and 1418 transitions. [2021-08-21 12:22:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:22:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:13,970 INFO L225 Difference]: With dead ends: 483 [2021-08-21 12:22:13,970 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 12:22:13,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 12:22:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 330. [2021-08-21 12:22:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-08-21 12:22:13,974 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 20 [2021-08-21 12:22:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:13,974 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-08-21 12:22:13,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-08-21 12:22:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:13,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:13,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:14,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:14,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-08-21 12:22:14,185 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash -603861295, now seen corresponding path program 165 times [2021-08-21 12:22:14,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:14,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954142330] [2021-08-21 12:22:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:14,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:14,324 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 12:22:14,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:14,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954142330] [2021-08-21 12:22:14,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954142330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:14,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678064167] [2021-08-21 12:22:14,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:22:14,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:14,341 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:14,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 12:22:17,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:22:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:17,900 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:17,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:22:17,940 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:22:17,945 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:17,945 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-08-21 12:22:17,996 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 12:22:17,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678064167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:17,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:17,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:22:17,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614566853] [2021-08-21 12:22:17,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:22:17,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:22:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:22:17,996 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:18,103 INFO L93 Difference]: Finished difference Result 403 states and 1184 transitions. [2021-08-21 12:22:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:22:18,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:18,104 INFO L225 Difference]: With dead ends: 403 [2021-08-21 12:22:18,104 INFO L226 Difference]: Without dead ends: 388 [2021-08-21 12:22:18,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:22:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-21 12:22:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 326. [2021-08-21 12:22:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-08-21 12:22:18,108 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-08-21 12:22:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:18,108 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-08-21 12:22:18,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-08-21 12:22:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:18,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:18,108 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:18,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:18,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:18,334 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:18,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:18,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1515277913, now seen corresponding path program 166 times [2021-08-21 12:22:18,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:18,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484278016] [2021-08-21 12:22:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:18,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:18,487 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 12:22:18,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:18,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484278016] [2021-08-21 12:22:18,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484278016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:18,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85925234] [2021-08-21 12:22:18,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:22:18,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:18,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:18,488 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:18,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 12:22:21,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:22:21,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:21,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:21,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:22,029 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:22,029 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-08-21 12:22:22,180 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:22:22,185 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:22,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-08-21 12:22:22,219 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 12:22:22,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85925234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:22,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:22,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:22,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814745338] [2021-08-21 12:22:22,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:22,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:22,220 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:22,479 INFO L93 Difference]: Finished difference Result 484 states and 1429 transitions. [2021-08-21 12:22:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:22:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:22,480 INFO L225 Difference]: With dead ends: 484 [2021-08-21 12:22:22,480 INFO L226 Difference]: Without dead ends: 469 [2021-08-21 12:22:22,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:22:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-21 12:22:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 336. [2021-08-21 12:22:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-08-21 12:22:22,484 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-08-21 12:22:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:22,484 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-08-21 12:22:22,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-08-21 12:22:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:22,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:22,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:22,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:22,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 12:22:22,706 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:22,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1193880861, now seen corresponding path program 167 times [2021-08-21 12:22:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:22,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271739288] [2021-08-21 12:22:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:22,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271739288] [2021-08-21 12:22:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271739288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899182265] [2021-08-21 12:22:22,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:22:22,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:22,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:22,799 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:22,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 12:22:26,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:22:26,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:26,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:26,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:26,531 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:26,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:22:26,595 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:26,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:22:26,599 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:26,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:22:26,628 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 12:22:26,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899182265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:26,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:26,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:22:26,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060570421] [2021-08-21 12:22:26,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:22:26,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:22:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:22:26,629 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:22:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:26,725 INFO L93 Difference]: Finished difference Result 401 states and 1179 transitions. [2021-08-21 12:22:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:22:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:26,726 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:22:26,726 INFO L226 Difference]: Without dead ends: 386 [2021-08-21 12:22:26,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:22:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-21 12:22:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 334. [2021-08-21 12:22:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.993993993993994) internal successors, (997), 333 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 997 transitions. [2021-08-21 12:22:26,730 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 997 transitions. Word has length 20 [2021-08-21 12:22:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:26,730 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 997 transitions. [2021-08-21 12:22:26,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:22:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 997 transitions. [2021-08-21 12:22:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:26,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:26,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:26,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-21 12:22:26,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-21 12:22:26,945 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash 732334439, now seen corresponding path program 168 times [2021-08-21 12:22:26,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:26,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979669114] [2021-08-21 12:22:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:26,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:27,062 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 12:22:27,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:27,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979669114] [2021-08-21 12:22:27,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979669114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:27,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833345686] [2021-08-21 12:22:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:27,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:27,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:27,063 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:27,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 12:22:30,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:22:30,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:30,659 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:30,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:22:30,797 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:30,797 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 37 treesize of output 36 [2021-08-21 12:22:30,803 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:30,803 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-08-21 12:22:30,878 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 12:22:30,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833345686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:30,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:30,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:30,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543408844] [2021-08-21 12:22:30,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:30,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:30,879 INFO L87 Difference]: Start difference. First operand 334 states and 997 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:31,171 INFO L93 Difference]: Finished difference Result 496 states and 1459 transitions. [2021-08-21 12:22:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:22:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:31,172 INFO L225 Difference]: With dead ends: 496 [2021-08-21 12:22:31,172 INFO L226 Difference]: Without dead ends: 481 [2021-08-21 12:22:31,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:22:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-21 12:22:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 331. [2021-08-21 12:22:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.987878787878788) internal successors, (986), 330 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 986 transitions. [2021-08-21 12:22:31,176 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 986 transitions. Word has length 20 [2021-08-21 12:22:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:31,176 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 986 transitions. [2021-08-21 12:22:31,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 986 transitions. [2021-08-21 12:22:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:31,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:31,177 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:31,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:31,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:31,377 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash -876999399, now seen corresponding path program 169 times [2021-08-21 12:22:31,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:31,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425414839] [2021-08-21 12:22:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:31,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:31,542 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 12:22:31,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:31,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425414839] [2021-08-21 12:22:31,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425414839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:31,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622840463] [2021-08-21 12:22:31,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:31,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:31,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:31,543 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:31,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 12:22:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:35,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:35,149 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:35,149 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 32 treesize of output 31 [2021-08-21 12:22:35,196 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:35,197 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 42 treesize of output 41 [2021-08-21 12:22:35,203 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:35,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 30 [2021-08-21 12:22:35,273 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 12:22:35,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622840463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:35,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:35,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:22:35,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137772442] [2021-08-21 12:22:35,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:22:35,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:22:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:22:35,273 INFO L87 Difference]: Start difference. First operand 331 states and 986 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:35,453 INFO L93 Difference]: Finished difference Result 417 states and 1225 transitions. [2021-08-21 12:22:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:22:35,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:35,454 INFO L225 Difference]: With dead ends: 417 [2021-08-21 12:22:35,454 INFO L226 Difference]: Without dead ends: 402 [2021-08-21 12:22:35,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:22:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-21 12:22:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 330. [2021-08-21 12:22:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-08-21 12:22:35,458 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-08-21 12:22:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:35,458 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-08-21 12:22:35,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-08-21 12:22:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:35,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:35,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:35,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:35,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:35,665 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1447486109, now seen corresponding path program 170 times [2021-08-21 12:22:35,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:35,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970257452] [2021-08-21 12:22:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:35,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:35,829 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 12:22:35,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:35,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970257452] [2021-08-21 12:22:35,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970257452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:35,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538481003] [2021-08-21 12:22:35,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:22:35,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:35,830 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 12:22:39,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:39,639 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:39,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 34 [2021-08-21 12:22:39,697 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 treesize of output 35 [2021-08-21 12:22:39,704 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:39,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 21 [2021-08-21 12:22:39,781 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 12:22:39,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538481003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:39,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:39,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:39,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086032901] [2021-08-21 12:22:39,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:39,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:39,782 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:40,050 INFO L93 Difference]: Finished difference Result 450 states and 1328 transitions. [2021-08-21 12:22:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:22:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:40,051 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:22:40,051 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:22:40,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:22:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:22:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 327. [2021-08-21 12:22:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-08-21 12:22:40,055 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-08-21 12:22:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:40,055 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-08-21 12:22:40,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:40,056 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-08-21 12:22:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:40,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:40,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:40,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:40,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:40,264 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash 812943505, now seen corresponding path program 171 times [2021-08-21 12:22:40,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:40,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751960338] [2021-08-21 12:22:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:40,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:40,482 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 12:22:40,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:40,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751960338] [2021-08-21 12:22:40,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751960338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:40,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145380916] [2021-08-21 12:22:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:22:40,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:40,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:40,484 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:40,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 12:22:44,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:22:44,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:44,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:44,281 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:44,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:22:44,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:44,347 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 41 treesize of output 40 [2021-08-21 12:22:44,354 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:44,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:22:44,464 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 12:22:44,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145380916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:44,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:44,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:44,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385637454] [2021-08-21 12:22:44,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:44,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:44,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:44,465 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:44,763 INFO L93 Difference]: Finished difference Result 476 states and 1396 transitions. [2021-08-21 12:22:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:22:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:44,764 INFO L225 Difference]: With dead ends: 476 [2021-08-21 12:22:44,764 INFO L226 Difference]: Without dead ends: 461 [2021-08-21 12:22:44,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:22:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-21 12:22:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 326. [2021-08-21 12:22:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-08-21 12:22:44,768 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-08-21 12:22:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:44,768 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-08-21 12:22:44,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-08-21 12:22:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:44,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:44,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:44,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:44,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-21 12:22:44,977 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash -351344739, now seen corresponding path program 172 times [2021-08-21 12:22:44,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:44,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364751501] [2021-08-21 12:22:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:44,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:45,185 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 12:22:45,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:45,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364751501] [2021-08-21 12:22:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364751501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:45,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700979185] [2021-08-21 12:22:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:22:45,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:45,186 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:45,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 12:22:48,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:22:48,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:48,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:48,918 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:48,918 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 38 treesize of output 37 [2021-08-21 12:22:48,989 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:48,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 44 [2021-08-21 12:22:48,993 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:48,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:22:49,040 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 12:22:49,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700979185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:49,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:49,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:49,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389121276] [2021-08-21 12:22:49,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:49,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:49,041 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:49,275 INFO L93 Difference]: Finished difference Result 449 states and 1326 transitions. [2021-08-21 12:22:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:22:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:49,276 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:22:49,276 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 12:22:49,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 12:22:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 332. [2021-08-21 12:22:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2021-08-21 12:22:49,280 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 20 [2021-08-21 12:22:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:49,280 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2021-08-21 12:22:49,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2021-08-21 12:22:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:49,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:49,281 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:49,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-21 12:22:49,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:49,505 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 244761177, now seen corresponding path program 173 times [2021-08-21 12:22:49,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:49,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222383226] [2021-08-21 12:22:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:49,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:49,621 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 12:22:49,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:49,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222383226] [2021-08-21 12:22:49,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222383226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:49,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152402918] [2021-08-21 12:22:49,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:22:49,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:49,622 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:49,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 12:22:53,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:22:53,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:53,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:53,337 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:53,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:22:53,371 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 44 [2021-08-21 12:22:53,375 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:22:53,488 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 12:22:53,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152402918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:53,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:53,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:53,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385123922] [2021-08-21 12:22:53,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:53,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:53,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:53,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:53,489 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:53,778 INFO L93 Difference]: Finished difference Result 461 states and 1356 transitions. [2021-08-21 12:22:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:22:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:53,779 INFO L225 Difference]: With dead ends: 461 [2021-08-21 12:22:53,779 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 12:22:53,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 12:22:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 329. [2021-08-21 12:22:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:22:53,783 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:22:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:53,783 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:22:53,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:22:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:53,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:53,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:53,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:53,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:53,993 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash -247834585, now seen corresponding path program 174 times [2021-08-21 12:22:53,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:53,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278971358] [2021-08-21 12:22:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:53,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:54,116 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 12:22:54,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:54,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278971358] [2021-08-21 12:22:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278971358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:54,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737306661] [2021-08-21 12:22:54,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:54,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:54,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:54,118 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:54,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 12:22:57,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:22:57,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:22:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:57,855 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:57,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 42 [2021-08-21 12:22:57,904 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:57,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 43 [2021-08-21 12:22:57,909 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:57,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:22:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:57,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737306661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:57,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:57,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:22:57,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861485322] [2021-08-21 12:22:57,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:57,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:57,985 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:58,197 INFO L93 Difference]: Finished difference Result 449 states and 1325 transitions. [2021-08-21 12:22:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:22:58,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:22:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:58,198 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:22:58,198 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 12:22:58,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:22:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 12:22:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 325. [2021-08-21 12:22:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-08-21 12:22:58,201 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-08-21 12:22:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:58,202 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-08-21 12:22:58,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-08-21 12:22:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:22:58,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:58,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:58,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:58,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-08-21 12:22:58,411 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1572818233, now seen corresponding path program 175 times [2021-08-21 12:22:58,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:58,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584978828] [2021-08-21 12:22:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:58,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:58,517 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 12:22:58,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:58,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584978828] [2021-08-21 12:22:58,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584978828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:58,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319044143] [2021-08-21 12:22:58,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:58,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:58,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:58,524 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:58,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 12:23:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:02,287 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 19 treesize of output 15 [2021-08-21 12:23:02,341 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 21 treesize of output 17 [2021-08-21 12:23:02,355 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 12:23:02,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319044143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:02,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:02,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:23:02,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492048528] [2021-08-21 12:23:02,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:02,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:02,356 INFO L87 Difference]: Start difference. First operand 325 states and 966 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 12:23:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:02,468 INFO L93 Difference]: Finished difference Result 429 states and 1268 transitions. [2021-08-21 12:23:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:23:02,469 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 20 [2021-08-21 12:23:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:02,469 INFO L225 Difference]: With dead ends: 429 [2021-08-21 12:23:02,469 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 12:23:02,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:23:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 12:23:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 342. [2021-08-21 12:23:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.997067448680352) internal successors, (1022), 341 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1022 transitions. [2021-08-21 12:23:02,473 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1022 transitions. Word has length 20 [2021-08-21 12:23:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:02,473 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1022 transitions. [2021-08-21 12:23:02,473 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 12:23:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1022 transitions. [2021-08-21 12:23:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:02,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:02,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:02,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:02,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:02,700 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash -12990289, now seen corresponding path program 176 times [2021-08-21 12:23:02,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:02,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126305530] [2021-08-21 12:23:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:02,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:02,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:02,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126305530] [2021-08-21 12:23:02,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126305530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:02,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008851068] [2021-08-21 12:23:02,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:02,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:02,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:02,799 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:02,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 12:23:06,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:06,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:06,529 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 19 treesize of output 15 [2021-08-21 12:23:06,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:23:06,670 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 12:23:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008851068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:06,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:06,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:06,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579414585] [2021-08-21 12:23:06,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:06,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:06,671 INFO L87 Difference]: Start difference. First operand 342 states and 1022 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:06,933 INFO L93 Difference]: Finished difference Result 506 states and 1491 transitions. [2021-08-21 12:23:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:23:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:06,934 INFO L225 Difference]: With dead ends: 506 [2021-08-21 12:23:06,934 INFO L226 Difference]: Without dead ends: 491 [2021-08-21 12:23:06,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-21 12:23:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 340. [2021-08-21 12:23:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.994100294985251) internal successors, (1015), 339 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1015 transitions. [2021-08-21 12:23:06,938 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1015 transitions. Word has length 20 [2021-08-21 12:23:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:06,938 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1015 transitions. [2021-08-21 12:23:06,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1015 transitions. [2021-08-21 12:23:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:06,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:06,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:06,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-21 12:23:07,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:07,149 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:07,149 INFO L82 PathProgramCache]: Analyzing trace with hash -474536711, now seen corresponding path program 177 times [2021-08-21 12:23:07,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:07,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992338104] [2021-08-21 12:23:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:07,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:07,297 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 12:23:07,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:07,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992338104] [2021-08-21 12:23:07,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992338104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:07,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987149426] [2021-08-21 12:23:07,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:23:07,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:07,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:07,298 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:07,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 12:23:11,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:23:11,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:11,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:11,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:11,098 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 19 treesize of output 15 [2021-08-21 12:23:11,170 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 21 treesize of output 17 [2021-08-21 12:23:11,206 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 12:23:11,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987149426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:11,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:11,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:23:11,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667963718] [2021-08-21 12:23:11,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:23:11,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:23:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:23:11,208 INFO L87 Difference]: Start difference. First operand 340 states and 1015 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 12:23:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:11,377 INFO L93 Difference]: Finished difference Result 441 states and 1298 transitions. [2021-08-21 12:23:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:23:11,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:11,378 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:23:11,378 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 12:23:11,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 12:23:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 337. [2021-08-21 12:23:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.988095238095238) internal successors, (1004), 336 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1004 transitions. [2021-08-21 12:23:11,382 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1004 transitions. Word has length 20 [2021-08-21 12:23:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:11,382 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1004 transitions. [2021-08-21 12:23:11,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 12:23:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1004 transitions. [2021-08-21 12:23:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:11,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:11,383 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:11,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:11,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:11,601 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2083870549, now seen corresponding path program 178 times [2021-08-21 12:23:11,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:11,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107367353] [2021-08-21 12:23:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:11,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:11,833 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 12:23:11,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:11,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107367353] [2021-08-21 12:23:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107367353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:11,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500989769] [2021-08-21 12:23:11,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:23:11,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:11,834 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:11,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 12:23:15,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:23:15,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:15,739 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 19 treesize of output 15 [2021-08-21 12:23:15,766 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 21 treesize of output 17 [2021-08-21 12:23:15,879 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 12:23:15,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500989769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:15,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:15,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:15,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056321894] [2021-08-21 12:23:15,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:15,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:15,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:15,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:15,880 INFO L87 Difference]: Start difference. First operand 337 states and 1004 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:16,150 INFO L93 Difference]: Finished difference Result 522 states and 1537 transitions. [2021-08-21 12:23:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:23:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:16,151 INFO L225 Difference]: With dead ends: 522 [2021-08-21 12:23:16,151 INFO L226 Difference]: Without dead ends: 507 [2021-08-21 12:23:16,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-21 12:23:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 336. [2021-08-21 12:23:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.982089552238806) internal successors, (999), 335 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 999 transitions. [2021-08-21 12:23:16,155 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 999 transitions. Word has length 20 [2021-08-21 12:23:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:16,156 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 999 transitions. [2021-08-21 12:23:16,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 999 transitions. [2021-08-21 12:23:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:16,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:16,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:16,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-08-21 12:23:16,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 12:23:16,367 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash 240614959, now seen corresponding path program 179 times [2021-08-21 12:23:16,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:16,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096702155] [2021-08-21 12:23:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:16,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:16,568 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 12:23:16,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:16,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096702155] [2021-08-21 12:23:16,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096702155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:16,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018322292] [2021-08-21 12:23:16,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:23:16,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:16,569 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:16,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 12:23:20,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:23:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:23:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:20,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:23:20,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:23:20,673 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 12:23:20,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018322292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:20,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:20,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:20,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134564912] [2021-08-21 12:23:20,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:20,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:20,674 INFO L87 Difference]: Start difference. First operand 336 states and 999 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:21,003 INFO L93 Difference]: Finished difference Result 498 states and 1484 transitions. [2021-08-21 12:23:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:23:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:21,004 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:23:21,004 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:23:21,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:23:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 333. [2021-08-21 12:23:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9849397590361444) internal successors, (991), 332 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 991 transitions. [2021-08-21 12:23:21,008 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 991 transitions. Word has length 20 [2021-08-21 12:23:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:21,008 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 991 transitions. [2021-08-21 12:23:21,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 991 transitions. [2021-08-21 12:23:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:21,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:21,009 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:21,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:21,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 12:23:21,209 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash -393927645, now seen corresponding path program 180 times [2021-08-21 12:23:21,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:21,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245080186] [2021-08-21 12:23:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:21,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:21,393 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 12:23:21,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:21,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245080186] [2021-08-21 12:23:21,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245080186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:21,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99174662] [2021-08-21 12:23:21,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:23:21,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:21,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:21,394 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:21,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 12:23:25,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:23:25,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:25,088 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 19 treesize of output 15 [2021-08-21 12:23:25,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:23:25,227 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 12:23:25,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99174662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:25,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:25,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:25,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227663528] [2021-08-21 12:23:25,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:25,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:25,228 INFO L87 Difference]: Start difference. First operand 333 states and 991 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:25,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:25,594 INFO L93 Difference]: Finished difference Result 511 states and 1501 transitions. [2021-08-21 12:23:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:23:25,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:25,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:25,595 INFO L225 Difference]: With dead ends: 511 [2021-08-21 12:23:25,595 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 12:23:25,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:23:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 12:23:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 332. [2021-08-21 12:23:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-08-21 12:23:25,599 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-08-21 12:23:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:25,599 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-08-21 12:23:25,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-08-21 12:23:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:25,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:25,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:25,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-21 12:23:25,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:25,813 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash 317390009, now seen corresponding path program 181 times [2021-08-21 12:23:25,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:25,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803761331] [2021-08-21 12:23:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:25,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:25,912 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 12:23:25,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:25,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803761331] [2021-08-21 12:23:25,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803761331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:25,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225206958] [2021-08-21 12:23:25,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:23:25,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:25,914 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:25,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 12:23:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:29,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:23:29,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:23:29,874 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 12:23:29,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225206958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:29,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:29,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:23:29,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205578113] [2021-08-21 12:23:29,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:23:29,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:23:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:23:29,875 INFO L87 Difference]: Start difference. First operand 332 states and 987 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 12:23:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:30,120 INFO L93 Difference]: Finished difference Result 587 states and 1727 transitions. [2021-08-21 12:23:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:23:30,120 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 20 [2021-08-21 12:23:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:30,121 INFO L225 Difference]: With dead ends: 587 [2021-08-21 12:23:30,121 INFO L226 Difference]: Without dead ends: 572 [2021-08-21 12:23:30,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:23:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-21 12:23:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 327. [2021-08-21 12:23:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9877300613496933) internal successors, (974), 326 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 974 transitions. [2021-08-21 12:23:30,125 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 974 transitions. Word has length 20 [2021-08-21 12:23:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:30,125 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 974 transitions. [2021-08-21 12:23:30,125 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 12:23:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 974 transitions. [2021-08-21 12:23:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:30,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:30,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:30,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:30,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-08-21 12:23:30,345 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash 30383591, now seen corresponding path program 182 times [2021-08-21 12:23:30,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:30,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345638788] [2021-08-21 12:23:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:30,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:30,465 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 12:23:30,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:30,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345638788] [2021-08-21 12:23:30,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345638788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:30,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475023686] [2021-08-21 12:23:30,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:30,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:30,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:30,466 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:30,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 12:23:34,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:34,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:34,437 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 19 treesize of output 15 [2021-08-21 12:23:34,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:23:34,532 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 12:23:34,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475023686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:34,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:34,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:23:34,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480432559] [2021-08-21 12:23:34,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:23:34,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:23:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:23:34,533 INFO L87 Difference]: Start difference. First operand 327 states and 974 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 12:23:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:34,639 INFO L93 Difference]: Finished difference Result 570 states and 1661 transitions. [2021-08-21 12:23:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:23:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 20 [2021-08-21 12:23:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:34,640 INFO L225 Difference]: With dead ends: 570 [2021-08-21 12:23:34,640 INFO L226 Difference]: Without dead ends: 555 [2021-08-21 12:23:34,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:23:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-08-21 12:23:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 325. [2021-08-21 12:23:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-08-21 12:23:34,644 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-08-21 12:23:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:34,644 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-08-21 12:23:34,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 12:23:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-08-21 12:23:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:34,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:34,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:34,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-21 12:23:34,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:34,861 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash -82598311, now seen corresponding path program 183 times [2021-08-21 12:23:34,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:34,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181181313] [2021-08-21 12:23:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:34,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:35,016 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 12:23:35,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:35,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181181313] [2021-08-21 12:23:35,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181181313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:35,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580689067] [2021-08-21 12:23:35,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:23:35,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:35,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:35,017 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:35,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 12:23:38,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:23:38,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:38,989 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 19 treesize of output 15 [2021-08-21 12:23:39,036 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 21 treesize of output 17 [2021-08-21 12:23:39,100 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 12:23:39,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580689067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:39,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:39,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:39,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773620358] [2021-08-21 12:23:39,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:39,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:39,101 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:39,534 INFO L93 Difference]: Finished difference Result 489 states and 1445 transitions. [2021-08-21 12:23:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:23:39,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:39,535 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:23:39,535 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:23:39,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:23:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:23:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 337. [2021-08-21 12:23:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-08-21 12:23:39,539 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 20 [2021-08-21 12:23:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:39,539 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-08-21 12:23:39,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-08-21 12:23:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:39,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:39,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:39,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:39,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:39,753 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:39,753 INFO L82 PathProgramCache]: Analyzing trace with hash 513507605, now seen corresponding path program 184 times [2021-08-21 12:23:39,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:39,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961792218] [2021-08-21 12:23:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:39,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:39,861 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 12:23:39,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:39,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961792218] [2021-08-21 12:23:39,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961792218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:39,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146970924] [2021-08-21 12:23:39,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:23:39,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:39,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:39,866 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:39,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 12:23:43,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:23:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:43,820 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 19 treesize of output 15 [2021-08-21 12:23:43,841 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 21 treesize of output 17 [2021-08-21 12:23:43,930 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 12:23:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146970924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:43,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:43,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:43,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186415303] [2021-08-21 12:23:43,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:43,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:43,931 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:44,242 INFO L93 Difference]: Finished difference Result 501 states and 1475 transitions. [2021-08-21 12:23:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:23:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:44,243 INFO L225 Difference]: With dead ends: 501 [2021-08-21 12:23:44,244 INFO L226 Difference]: Without dead ends: 486 [2021-08-21 12:23:44,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:23:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-21 12:23:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 334. [2021-08-21 12:23:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-08-21 12:23:44,247 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 20 [2021-08-21 12:23:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:44,248 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-08-21 12:23:44,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-08-21 12:23:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:44,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:44,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:44,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:44,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:44,457 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash 20911843, now seen corresponding path program 185 times [2021-08-21 12:23:44,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:44,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467544841] [2021-08-21 12:23:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:44,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:44,576 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 12:23:44,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:44,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467544841] [2021-08-21 12:23:44,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467544841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:44,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895258381] [2021-08-21 12:23:44,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:23:44,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:44,577 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:44,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 12:23:48,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:23:48,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:23:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:48,560 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 19 treesize of output 15 [2021-08-21 12:23:48,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:23:48,836 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 12:23:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895258381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:48,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:48,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:48,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272934580] [2021-08-21 12:23:48,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:48,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:48,837 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:49,168 INFO L93 Difference]: Finished difference Result 489 states and 1457 transitions. [2021-08-21 12:23:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:23:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:49,169 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:23:49,169 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:23:49,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:23:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 331. [2021-08-21 12:23:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.981818181818182) internal successors, (984), 330 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 984 transitions. [2021-08-21 12:23:49,173 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 984 transitions. Word has length 20 [2021-08-21 12:23:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:49,173 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 984 transitions. [2021-08-21 12:23:49,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 984 transitions. [2021-08-21 12:23:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:49,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:49,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:49,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-21 12:23:49,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:49,381 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1506001169, now seen corresponding path program 186 times [2021-08-21 12:23:49,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:49,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414620626] [2021-08-21 12:23:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:49,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:49,532 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 12:23:49,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:49,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414620626] [2021-08-21 12:23:49,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414620626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:49,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576723307] [2021-08-21 12:23:49,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:23:49,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:49,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:49,533 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:49,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 12:23:53,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:23:53,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:53,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:53,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:23:53,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:23:53,728 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 12:23:53,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576723307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:53,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:53,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:23:53,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750338000] [2021-08-21 12:23:53,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:23:53,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:53,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:23:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:23:53,729 INFO L87 Difference]: Start difference. First operand 331 states and 984 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:54,041 INFO L93 Difference]: Finished difference Result 578 states and 1700 transitions. [2021-08-21 12:23:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:23:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:54,042 INFO L225 Difference]: With dead ends: 578 [2021-08-21 12:23:54,042 INFO L226 Difference]: Without dead ends: 563 [2021-08-21 12:23:54,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-08-21 12:23:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 323. [2021-08-21 12:23:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-08-21 12:23:54,046 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 20 [2021-08-21 12:23:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:54,046 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-08-21 12:23:54,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-08-21 12:23:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:54,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:54,047 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:54,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:54,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:54,257 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1996347205, now seen corresponding path program 187 times [2021-08-21 12:23:54,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:54,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319141660] [2021-08-21 12:23:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:54,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:54,393 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 12:23:54,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:54,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319141660] [2021-08-21 12:23:54,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319141660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:54,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975943377] [2021-08-21 12:23:54,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:23:54,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:54,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:54,394 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:54,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 12:23:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:23:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:58,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:23:58,464 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 21 treesize of output 17 [2021-08-21 12:23:58,541 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 12:23:58,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975943377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:58,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:58,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:23:58,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517647718] [2021-08-21 12:23:58,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:58,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:58,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:58,542 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:58,962 INFO L93 Difference]: Finished difference Result 703 states and 2067 transitions. [2021-08-21 12:23:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:23:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:23:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:58,963 INFO L225 Difference]: With dead ends: 703 [2021-08-21 12:23:58,963 INFO L226 Difference]: Without dead ends: 688 [2021-08-21 12:23:58,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:23:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-21 12:23:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 332. [2021-08-21 12:23:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-08-21 12:23:58,968 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-08-21 12:23:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:58,968 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-08-21 12:23:58,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-08-21 12:23:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:23:58,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:58,969 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:58,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:59,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-08-21 12:23:59,185 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash -381198051, now seen corresponding path program 188 times [2021-08-21 12:23:59,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:59,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060871515] [2021-08-21 12:23:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:59,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:59,354 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 12:23:59,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:59,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060871515] [2021-08-21 12:23:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060871515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:59,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943510940] [2021-08-21 12:23:59,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:59,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:59,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:59,365 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:59,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 12:24:03,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:24:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:03,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:24:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:03,539 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 19 treesize of output 15 [2021-08-21 12:24:03,602 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 21 treesize of output 17 [2021-08-21 12:24:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:03,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943510940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:03,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:03,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:24:03,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929285361] [2021-08-21 12:24:03,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:03,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:03,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:03,682 INFO L87 Difference]: Start difference. First operand 332 states and 987 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:03,985 INFO L93 Difference]: Finished difference Result 587 states and 1726 transitions. [2021-08-21 12:24:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:24:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:24:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:03,986 INFO L225 Difference]: With dead ends: 587 [2021-08-21 12:24:03,986 INFO L226 Difference]: Without dead ends: 572 [2021-08-21 12:24:03,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:24:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-21 12:24:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 338. [2021-08-21 12:24:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9910979228486645) internal successors, (1008), 337 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1008 transitions. [2021-08-21 12:24:03,991 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1008 transitions. Word has length 20 [2021-08-21 12:24:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:03,991 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1008 transitions. [2021-08-21 12:24:03,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1008 transitions. [2021-08-21 12:24:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:24:03,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:03,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:04,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:04,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 12:24:04,201 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash 214907865, now seen corresponding path program 189 times [2021-08-21 12:24:04,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:04,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885906987] [2021-08-21 12:24:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:04,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:04,355 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 12:24:04,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:04,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885906987] [2021-08-21 12:24:04,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885906987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:04,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647564108] [2021-08-21 12:24:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:24:04,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:04,356 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:04,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 12:24:08,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:24:08,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:24:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:08,534 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 19 treesize of output 15 [2021-08-21 12:24:08,557 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 21 treesize of output 17 [2021-08-21 12:24:08,643 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 12:24:08,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647564108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:08,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:08,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:24:08,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943216901] [2021-08-21 12:24:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:08,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:08,644 INFO L87 Difference]: Start difference. First operand 338 states and 1008 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:08,816 INFO L93 Difference]: Finished difference Result 599 states and 1756 transitions. [2021-08-21 12:24:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:24:08,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:24:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:08,817 INFO L225 Difference]: With dead ends: 599 [2021-08-21 12:24:08,817 INFO L226 Difference]: Without dead ends: 584 [2021-08-21 12:24:08,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:24:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-08-21 12:24:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 335. [2021-08-21 12:24:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9820359281437128) internal successors, (996), 334 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 996 transitions. [2021-08-21 12:24:08,822 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 996 transitions. Word has length 20 [2021-08-21 12:24:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:08,822 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 996 transitions. [2021-08-21 12:24:08,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 996 transitions. [2021-08-21 12:24:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:24:08,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:08,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:08,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:09,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 12:24:09,049 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash -277687897, now seen corresponding path program 190 times [2021-08-21 12:24:09,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:09,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351397303] [2021-08-21 12:24:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:09,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:09,199 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 12:24:09,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:09,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351397303] [2021-08-21 12:24:09,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351397303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:09,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370953667] [2021-08-21 12:24:09,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:24:09,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:09,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:09,200 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:09,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 12:24:13,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:24:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:24:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:13,289 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 19 treesize of output 15 [2021-08-21 12:24:13,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:24:13,435 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 12:24:13,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370953667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:13,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:13,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:24:13,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653014607] [2021-08-21 12:24:13,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:13,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:13,436 INFO L87 Difference]: Start difference. First operand 335 states and 996 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:13,741 INFO L93 Difference]: Finished difference Result 591 states and 1737 transitions. [2021-08-21 12:24:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:24:13,742 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:24:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:13,743 INFO L225 Difference]: With dead ends: 591 [2021-08-21 12:24:13,743 INFO L226 Difference]: Without dead ends: 576 [2021-08-21 12:24:13,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:24:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-08-21 12:24:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 329. [2021-08-21 12:24:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:24:13,747 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:24:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:13,747 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:24:13,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:24:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:24:13,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:13,747 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:13,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:13,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-21 12:24:13,965 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash 693787661, now seen corresponding path program 191 times [2021-08-21 12:24:13,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:13,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268841256] [2021-08-21 12:24:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:13,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:14,109 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 12:24:14,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:14,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268841256] [2021-08-21 12:24:14,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268841256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:14,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442802099] [2021-08-21 12:24:14,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:24:14,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:14,111 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:14,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 12:24:18,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:24:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:24:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:18,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:24:18,346 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 47 treesize of output 39 [2021-08-21 12:24:18,348 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 39 treesize of output 31 [2021-08-21 12:24:18,543 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 12:24:18,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442802099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:18,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:18,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:24:18,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100611657] [2021-08-21 12:24:18,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:18,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:18,544 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:18,965 INFO L93 Difference]: Finished difference Result 595 states and 1754 transitions. [2021-08-21 12:24:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:24:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:24:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:18,966 INFO L225 Difference]: With dead ends: 595 [2021-08-21 12:24:18,966 INFO L226 Difference]: Without dead ends: 580 [2021-08-21 12:24:18,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:24:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-21 12:24:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 341. [2021-08-21 12:24:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9911764705882353) internal successors, (1017), 340 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1017 transitions. [2021-08-21 12:24:18,971 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1017 transitions. Word has length 20 [2021-08-21 12:24:18,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:18,971 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1017 transitions. [2021-08-21 12:24:18,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1017 transitions. [2021-08-21 12:24:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:24:18,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:18,971 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:19,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-21 12:24:19,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:19,172 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1289893577, now seen corresponding path program 192 times [2021-08-21 12:24:19,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:19,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468420043] [2021-08-21 12:24:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:19,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:19,341 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 12:24:19,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:19,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468420043] [2021-08-21 12:24:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468420043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:19,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419535245] [2021-08-21 12:24:19,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:24:19,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:19,342 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:19,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 12:24:23,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:24:23,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:24:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:23,480 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 19 treesize of output 15 [2021-08-21 12:24:23,508 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 21 treesize of output 17 [2021-08-21 12:24:23,626 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 12:24:23,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419535245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:23,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:23,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:24:23,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022587840] [2021-08-21 12:24:23,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:23,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:23,627 INFO L87 Difference]: Start difference. First operand 341 states and 1017 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:23,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:23,955 INFO L93 Difference]: Finished difference Result 604 states and 1772 transitions. [2021-08-21 12:24:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:24:23,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:24:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:23,957 INFO L225 Difference]: With dead ends: 604 [2021-08-21 12:24:23,957 INFO L226 Difference]: Without dead ends: 589 [2021-08-21 12:24:23,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:24:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-21 12:24:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 338. [2021-08-21 12:24:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9821958456973294) internal successors, (1005), 337 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1005 transitions. [2021-08-21 12:24:23,961 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1005 transitions. Word has length 20 [2021-08-21 12:24:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:23,961 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1005 transitions. [2021-08-21 12:24:23,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:23,961 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1005 transitions. [2021-08-21 12:24:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:24:23,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:23,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:23,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:24,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:24,185 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash 797297815, now seen corresponding path program 193 times [2021-08-21 12:24:24,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:24,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975040397] [2021-08-21 12:24:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:24,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:24,291 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 12:24:24,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:24,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975040397] [2021-08-21 12:24:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975040397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:24,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321690629] [2021-08-21 12:24:24,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:24:24,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:24,292 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:24,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 12:24:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:28,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:24:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:28,475 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 19 treesize of output 15 [2021-08-21 12:24:28,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:24:28,621 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 12:24:28,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321690629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:28,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:28,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:24:28,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050908598] [2021-08-21 12:24:28,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:28,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:28,622 INFO L87 Difference]: Start difference. First operand 338 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:28,944 INFO L93 Difference]: Finished difference Result 583 states and 1715 transitions. [2021-08-21 12:24:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:24:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:24:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:28,945 INFO L225 Difference]: With dead ends: 583 [2021-08-21 12:24:28,945 INFO L226 Difference]: Without dead ends: 568 [2021-08-21 12:24:28,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:24:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-21 12:24:28,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 335. [2021-08-21 12:24:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9820359281437128) internal successors, (996), 334 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 996 transitions. [2021-08-21 12:24:28,949 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 996 transitions. Word has length 20 [2021-08-21 12:24:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:28,950 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 996 transitions. [2021-08-21 12:24:28,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 996 transitions. [2021-08-21 12:24:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:24:28,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:28,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:28,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:29,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-21 12:24:29,152 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2012580155, now seen corresponding path program 194 times [2021-08-21 12:24:29,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:29,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071113747] [2021-08-21 12:24:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:29,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:29,261 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 12:24:29,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:29,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071113747] [2021-08-21 12:24:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071113747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:29,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122235301] [2021-08-21 12:24:29,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:24:29,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:29,262 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:29,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 12:24:33,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:24:33,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:33,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:24:33,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:33,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:24:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-21 12:24:33,553 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 12:24:33,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122235301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:33,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:24:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744365124] [2021-08-21 12:24:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:24:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:24:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:24:33,554 INFO L87 Difference]: Start difference. First operand 335 states and 996 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 12:24:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:33,722 INFO L93 Difference]: Finished difference Result 612 states and 1793 transitions. [2021-08-21 12:24:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:24:33,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 20 [2021-08-21 12:24:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:33,724 INFO L225 Difference]: With dead ends: 612 [2021-08-21 12:24:33,724 INFO L226 Difference]: Without dead ends: 597 [2021-08-21 12:24:33,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-08-21 12:24:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 329. [2021-08-21 12:24:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-08-21 12:24:33,728 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-08-21 12:24:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:33,728 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-08-21 12:24:33,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 12:24:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-08-21 12:24:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:24:33,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:33,729 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:33,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:33,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-21 12:24:33,929 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:33,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:33,929 INFO L82 PathProgramCache]: Analyzing trace with hash -59516404, now seen corresponding path program 195 times [2021-08-21 12:24:33,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:33,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576331531] [2021-08-21 12:24:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:33,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:34,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:34,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576331531] [2021-08-21 12:24:34,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576331531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:34,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694244463] [2021-08-21 12:24:34,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:24:34,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:34,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:34,059 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:34,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 12:24:38,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:24:38,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:24:38,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:38,276 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:38,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:24:38,408 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:24:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:38,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694244463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:38,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:38,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:24:38,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233187777] [2021-08-21 12:24:38,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:24:38,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:24:38,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:24:38,446 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:39,152 INFO L93 Difference]: Finished difference Result 773 states and 2266 transitions. [2021-08-21 12:24:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:24:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:24:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:39,154 INFO L225 Difference]: With dead ends: 773 [2021-08-21 12:24:39,154 INFO L226 Difference]: Without dead ends: 754 [2021-08-21 12:24:39,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:24:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-08-21 12:24:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 339. [2021-08-21 12:24:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9911242603550297) internal successors, (1011), 338 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1011 transitions. [2021-08-21 12:24:39,159 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1011 transitions. Word has length 21 [2021-08-21 12:24:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:39,159 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1011 transitions. [2021-08-21 12:24:39,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1011 transitions. [2021-08-21 12:24:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:24:39,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:39,159 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:39,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:39,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-21 12:24:39,374 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:39,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1654908243, now seen corresponding path program 196 times [2021-08-21 12:24:39,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:39,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606156642] [2021-08-21 12:24:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:39,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:39,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:39,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606156642] [2021-08-21 12:24:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606156642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:39,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393858023] [2021-08-21 12:24:39,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:24:39,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:39,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:39,492 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 12:24:43,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:24:43,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:43,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:24:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:43,705 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:43,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:24:43,830 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:43,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:24:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:43,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393858023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:43,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:43,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:24:43,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256414413] [2021-08-21 12:24:43,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:24:43,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:43,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:24:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:24:43,877 INFO L87 Difference]: Start difference. First operand 339 states and 1011 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:44,344 INFO L93 Difference]: Finished difference Result 713 states and 2092 transitions. [2021-08-21 12:24:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:24:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:24:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:44,345 INFO L225 Difference]: With dead ends: 713 [2021-08-21 12:24:44,345 INFO L226 Difference]: Without dead ends: 674 [2021-08-21 12:24:44,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:24:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-08-21 12:24:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 339. [2021-08-21 12:24:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.985207100591716) internal successors, (1009), 338 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1009 transitions. [2021-08-21 12:24:44,350 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1009 transitions. Word has length 21 [2021-08-21 12:24:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:44,350 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1009 transitions. [2021-08-21 12:24:44,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1009 transitions. [2021-08-21 12:24:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:24:44,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:44,351 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:44,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-21 12:24:44,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:44,551 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2002216596, now seen corresponding path program 197 times [2021-08-21 12:24:44,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:44,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512515854] [2021-08-21 12:24:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:44,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:44,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:44,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512515854] [2021-08-21 12:24:44,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512515854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:44,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608999084] [2021-08-21 12:24:44,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:24:44,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:44,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:44,688 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:44,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 12:24:48,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:24:48,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:24:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:48,917 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:48,918 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 40 treesize of output 39 [2021-08-21 12:24:49,078 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:49,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:24:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:49,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608999084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:49,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:49,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:24:49,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545594764] [2021-08-21 12:24:49,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:24:49,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:24:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:24:49,123 INFO L87 Difference]: Start difference. First operand 339 states and 1009 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:49,718 INFO L93 Difference]: Finished difference Result 736 states and 2170 transitions. [2021-08-21 12:24:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:24:49,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:24:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:49,719 INFO L225 Difference]: With dead ends: 736 [2021-08-21 12:24:49,719 INFO L226 Difference]: Without dead ends: 717 [2021-08-21 12:24:49,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 452.1ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:24:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-08-21 12:24:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 341. [2021-08-21 12:24:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9823529411764707) internal successors, (1014), 340 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1014 transitions. [2021-08-21 12:24:49,724 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1014 transitions. Word has length 21 [2021-08-21 12:24:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:49,724 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1014 transitions. [2021-08-21 12:24:49,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1014 transitions. [2021-08-21 12:24:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:24:49,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:49,725 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:49,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:49,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:49,926 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1294687500, now seen corresponding path program 198 times [2021-08-21 12:24:49,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:49,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862369490] [2021-08-21 12:24:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:49,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:50,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:50,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862369490] [2021-08-21 12:24:50,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862369490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:50,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923241215] [2021-08-21 12:24:50,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:24:50,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:50,071 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:50,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 12:24:54,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:24:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:24:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:54,395 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:54,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:24:54,485 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:54,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:24:54,487 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 17 treesize of output 13 [2021-08-21 12:24:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:54,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923241215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:54,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:54,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:24:54,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807373194] [2021-08-21 12:24:54,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:24:54,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:24:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:24:54,554 INFO L87 Difference]: Start difference. First operand 341 states and 1014 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:55,305 INFO L93 Difference]: Finished difference Result 812 states and 2406 transitions. [2021-08-21 12:24:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:24:55,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:24:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:55,306 INFO L225 Difference]: With dead ends: 812 [2021-08-21 12:24:55,307 INFO L226 Difference]: Without dead ends: 789 [2021-08-21 12:24:55,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:24:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-08-21 12:24:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 341. [2021-08-21 12:24:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9823529411764707) internal successors, (1014), 340 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1014 transitions. [2021-08-21 12:24:55,321 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1014 transitions. Word has length 21 [2021-08-21 12:24:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:55,321 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1014 transitions. [2021-08-21 12:24:55,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1014 transitions. [2021-08-21 12:24:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:24:55,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:55,321 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:55,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-21 12:24:55,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:55,522 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:55,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1025293522, now seen corresponding path program 199 times [2021-08-21 12:24:55,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:55,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752315248] [2021-08-21 12:24:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:55,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:55,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:55,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752315248] [2021-08-21 12:24:55,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752315248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:55,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822698981] [2021-08-21 12:24:55,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:24:55,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:55,681 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 12:24:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:24:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:59,992 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:25:00,085 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:25:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822698981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:00,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:00,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:25:00,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866444171] [2021-08-21 12:25:00,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:25:00,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:00,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:25:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:25:00,118 INFO L87 Difference]: Start difference. First operand 341 states and 1014 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:00,612 INFO L93 Difference]: Finished difference Result 606 states and 1791 transitions. [2021-08-21 12:25:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:25:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:00,613 INFO L225 Difference]: With dead ends: 606 [2021-08-21 12:25:00,613 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 12:25:00,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:25:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 12:25:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 347. [2021-08-21 12:25:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.985549132947977) internal successors, (1033), 346 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1033 transitions. [2021-08-21 12:25:00,618 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1033 transitions. Word has length 21 [2021-08-21 12:25:00,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:00,618 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1033 transitions. [2021-08-21 12:25:00,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1033 transitions. [2021-08-21 12:25:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:00,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:00,618 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:00,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:00,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 12:25:00,844 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:00,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1749072051, now seen corresponding path program 200 times [2021-08-21 12:25:00,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:00,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824965995] [2021-08-21 12:25:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:00,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:00,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:00,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824965995] [2021-08-21 12:25:00,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824965995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:00,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114910699] [2021-08-21 12:25:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:25:00,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:00,977 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:00,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 12:25:05,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:25:05,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:05,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:05,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:05,322 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:05,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:25:05,458 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:05,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:25:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:05,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114910699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:05,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:05,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:25:05,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521194037] [2021-08-21 12:25:05,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:25:05,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:25:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:25:05,510 INFO L87 Difference]: Start difference. First operand 347 states and 1033 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:05,865 INFO L93 Difference]: Finished difference Result 658 states and 1932 transitions. [2021-08-21 12:25:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:25:05,865 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:05,866 INFO L225 Difference]: With dead ends: 658 [2021-08-21 12:25:05,866 INFO L226 Difference]: Without dead ends: 598 [2021-08-21 12:25:05,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:25:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-08-21 12:25:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 352. [2021-08-21 12:25:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.982905982905983) internal successors, (1047), 351 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1047 transitions. [2021-08-21 12:25:05,871 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1047 transitions. Word has length 21 [2021-08-21 12:25:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:05,871 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1047 transitions. [2021-08-21 12:25:05,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1047 transitions. [2021-08-21 12:25:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:05,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:05,871 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:05,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:06,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-21 12:25:06,072 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash 27230322, now seen corresponding path program 201 times [2021-08-21 12:25:06,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:06,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134915007] [2021-08-21 12:25:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:06,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:06,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:06,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134915007] [2021-08-21 12:25:06,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134915007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:06,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161392644] [2021-08-21 12:25:06,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:25:06,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:06,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:06,228 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:06,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 12:25:10,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:25:10,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:10,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:10,426 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:10,426 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 40 treesize of output 39 [2021-08-21 12:25:10,482 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:10,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-21 12:25:10,484 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 17 treesize of output 13 [2021-08-21 12:25:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:10,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161392644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:10,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:10,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:25:10,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149047226] [2021-08-21 12:25:10,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:25:10,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:25:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:25:10,595 INFO L87 Difference]: Start difference. First operand 352 states and 1047 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:11,128 INFO L93 Difference]: Finished difference Result 697 states and 2067 transitions. [2021-08-21 12:25:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:25:11,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:11,130 INFO L225 Difference]: With dead ends: 697 [2021-08-21 12:25:11,130 INFO L226 Difference]: Without dead ends: 674 [2021-08-21 12:25:11,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:25:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-08-21 12:25:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 348. [2021-08-21 12:25:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9827089337175794) internal successors, (1035), 347 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1035 transitions. [2021-08-21 12:25:11,135 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1035 transitions. Word has length 21 [2021-08-21 12:25:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:11,135 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1035 transitions. [2021-08-21 12:25:11,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1035 transitions. [2021-08-21 12:25:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:11,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:11,135 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:11,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:11,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 12:25:11,345 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1067466120, now seen corresponding path program 202 times [2021-08-21 12:25:11,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:11,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644032594] [2021-08-21 12:25:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:11,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:11,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:11,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644032594] [2021-08-21 12:25:11,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644032594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:11,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265770292] [2021-08-21 12:25:11,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:25:11,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:11,495 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:11,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 12:25:15,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:25:15,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:25:16,053 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:16,053 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-08-21 12:25:16,059 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:25:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:16,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265770292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:16,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:16,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:25:16,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752037146] [2021-08-21 12:25:16,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:25:16,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:25:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:25:16,148 INFO L87 Difference]: Start difference. First operand 348 states and 1035 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:16,880 INFO L93 Difference]: Finished difference Result 688 states and 2024 transitions. [2021-08-21 12:25:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:25:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:16,881 INFO L225 Difference]: With dead ends: 688 [2021-08-21 12:25:16,881 INFO L226 Difference]: Without dead ends: 661 [2021-08-21 12:25:16,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:25:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-21 12:25:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 349. [2021-08-21 12:25:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9885057471264367) internal successors, (1040), 348 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1040 transitions. [2021-08-21 12:25:16,886 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1040 transitions. Word has length 21 [2021-08-21 12:25:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:16,886 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1040 transitions. [2021-08-21 12:25:16,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1040 transitions. [2021-08-21 12:25:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:16,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:16,886 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:16,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:17,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 12:25:17,113 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1670707117, now seen corresponding path program 203 times [2021-08-21 12:25:17,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:17,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826492001] [2021-08-21 12:25:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:17,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:17,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:17,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826492001] [2021-08-21 12:25:17,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826492001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:17,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105588907] [2021-08-21 12:25:17,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:25:17,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:17,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:17,250 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:17,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 12:25:21,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:25:21,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:21,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-08-21 12:25:21,677 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:21,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 33 [2021-08-21 12:25:21,682 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:21,682 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 30 treesize of output 29 [2021-08-21 12:25:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:21,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105588907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:21,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:21,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:25:21,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930396198] [2021-08-21 12:25:21,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:25:21,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:21,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:25:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:25:21,769 INFO L87 Difference]: Start difference. First operand 349 states and 1040 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:22,150 INFO L93 Difference]: Finished difference Result 614 states and 1810 transitions. [2021-08-21 12:25:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:25:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:22,151 INFO L225 Difference]: With dead ends: 614 [2021-08-21 12:25:22,151 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 12:25:22,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:25:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 12:25:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 363. [2021-08-21 12:25:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.994475138121547) internal successors, (1084), 362 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1084 transitions. [2021-08-21 12:25:22,156 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1084 transitions. Word has length 21 [2021-08-21 12:25:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:22,156 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1084 transitions. [2021-08-21 12:25:22,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1084 transitions. [2021-08-21 12:25:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:22,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:22,156 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:22,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:22,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-21 12:25:22,373 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:22,373 INFO L82 PathProgramCache]: Analyzing trace with hash 672643917, now seen corresponding path program 204 times [2021-08-21 12:25:22,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:22,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326723922] [2021-08-21 12:25:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:22,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:22,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:22,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326723922] [2021-08-21 12:25:22,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326723922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:22,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627818876] [2021-08-21 12:25:22,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:25:22,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:22,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:22,512 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:22,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 12:25:26,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:25:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:26,964 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 32 treesize of output 28 [2021-08-21 12:25:27,019 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:27,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:25:27,025 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:27,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-08-21 12:25:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:27,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627818876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:27,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:27,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:25:27,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201722438] [2021-08-21 12:25:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:25:27,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:25:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:25:27,074 INFO L87 Difference]: Start difference. First operand 363 states and 1084 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:27,360 INFO L93 Difference]: Finished difference Result 531 states and 1562 transitions. [2021-08-21 12:25:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:25:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:27,361 INFO L225 Difference]: With dead ends: 531 [2021-08-21 12:25:27,361 INFO L226 Difference]: Without dead ends: 510 [2021-08-21 12:25:27,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:25:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-21 12:25:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 357. [2021-08-21 12:25:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.002808988764045) internal successors, (1069), 356 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1069 transitions. [2021-08-21 12:25:27,366 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1069 transitions. Word has length 21 [2021-08-21 12:25:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:27,366 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1069 transitions. [2021-08-21 12:25:27,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1069 transitions. [2021-08-21 12:25:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:27,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:27,366 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:27,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:27,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-21 12:25:27,567 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash -474877415, now seen corresponding path program 205 times [2021-08-21 12:25:27,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:27,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596053734] [2021-08-21 12:25:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:27,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:27,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:27,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596053734] [2021-08-21 12:25:27,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596053734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:27,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824996930] [2021-08-21 12:25:27,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:25:27,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:27,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:27,685 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:27,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 12:25:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:32,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:32,138 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 17 treesize of output 13 [2021-08-21 12:25:32,170 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 19 treesize of output 15 [2021-08-21 12:25:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:32,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824996930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:32,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:32,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:25:32,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058810906] [2021-08-21 12:25:32,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:25:32,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:32,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:25:32,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:25:32,189 INFO L87 Difference]: Start difference. First operand 357 states and 1069 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:25:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:32,315 INFO L93 Difference]: Finished difference Result 530 states and 1568 transitions. [2021-08-21 12:25:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:25:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 21 [2021-08-21 12:25:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:32,316 INFO L225 Difference]: With dead ends: 530 [2021-08-21 12:25:32,316 INFO L226 Difference]: Without dead ends: 508 [2021-08-21 12:25:32,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:25:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-08-21 12:25:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 369. [2021-08-21 12:25:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.032608695652174) internal successors, (1116), 368 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1116 transitions. [2021-08-21 12:25:32,320 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1116 transitions. Word has length 21 [2021-08-21 12:25:32,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:32,320 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1116 transitions. [2021-08-21 12:25:32,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:25:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1116 transitions. [2021-08-21 12:25:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:32,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:32,321 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:32,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:32,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:32,529 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1877389689, now seen corresponding path program 206 times [2021-08-21 12:25:32,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:32,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060325868] [2021-08-21 12:25:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:32,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:32,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:32,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060325868] [2021-08-21 12:25:32,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060325868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:32,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124363656] [2021-08-21 12:25:32,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:25:32,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:32,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:32,690 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:32,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 12:25:37,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:25:37,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:37,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:37,143 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 17 treesize of output 13 [2021-08-21 12:25:37,180 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 19 treesize of output 15 [2021-08-21 12:25:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:37,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124363656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:37,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:37,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:25:37,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082821466] [2021-08-21 12:25:37,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:25:37,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:25:37,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:25:37,200 INFO L87 Difference]: Start difference. First operand 369 states and 1116 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:25:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:37,357 INFO L93 Difference]: Finished difference Result 478 states and 1433 transitions. [2021-08-21 12:25:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:25:37,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 21 [2021-08-21 12:25:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:37,358 INFO L225 Difference]: With dead ends: 478 [2021-08-21 12:25:37,358 INFO L226 Difference]: Without dead ends: 456 [2021-08-21 12:25:37,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:25:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-21 12:25:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 375. [2021-08-21 12:25:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.0401069518716577) internal successors, (1137), 374 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1137 transitions. [2021-08-21 12:25:37,362 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1137 transitions. Word has length 21 [2021-08-21 12:25:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:37,362 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1137 transitions. [2021-08-21 12:25:37,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:25:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1137 transitions. [2021-08-21 12:25:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:37,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:37,363 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:37,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:37,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-21 12:25:37,573 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash 291581167, now seen corresponding path program 207 times [2021-08-21 12:25:37,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:37,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78516425] [2021-08-21 12:25:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:37,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:37,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:37,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78516425] [2021-08-21 12:25:37,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78516425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:37,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503376673] [2021-08-21 12:25:37,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:25:37,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:37,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:37,691 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:37,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 12:25:42,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:25:42,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:42,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:42,154 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 17 treesize of output 13 [2021-08-21 12:25:42,170 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 19 treesize of output 15 [2021-08-21 12:25:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:42,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503376673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:42,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:42,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:25:42,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127932775] [2021-08-21 12:25:42,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:25:42,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:25:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:25:42,203 INFO L87 Difference]: Start difference. First operand 375 states and 1137 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:25:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:42,290 INFO L93 Difference]: Finished difference Result 487 states and 1457 transitions. [2021-08-21 12:25:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:25:42,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:42,291 INFO L225 Difference]: With dead ends: 487 [2021-08-21 12:25:42,291 INFO L226 Difference]: Without dead ends: 465 [2021-08-21 12:25:42,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:25:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-08-21 12:25:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 372. [2021-08-21 12:25:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.032345013477089) internal successors, (1125), 371 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1125 transitions. [2021-08-21 12:25:42,295 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1125 transitions. Word has length 21 [2021-08-21 12:25:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:42,295 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1125 transitions. [2021-08-21 12:25:42,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:25:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1125 transitions. [2021-08-21 12:25:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:42,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:42,296 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:42,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:42,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:42,498 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash 879326489, now seen corresponding path program 208 times [2021-08-21 12:25:42,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:42,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440319955] [2021-08-21 12:25:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:42,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:42,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440319955] [2021-08-21 12:25:42,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440319955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569508908] [2021-08-21 12:25:42,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:25:42,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:42,612 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:42,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 12:25:47,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:25:47,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:47,167 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 17 treesize of output 13 [2021-08-21 12:25:47,186 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 19 treesize of output 15 [2021-08-21 12:25:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:47,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569508908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:47,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:47,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:25:47,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176779605] [2021-08-21 12:25:47,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:25:47,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:25:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:25:47,220 INFO L87 Difference]: Start difference. First operand 372 states and 1125 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 12:25:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:47,313 INFO L93 Difference]: Finished difference Result 475 states and 1424 transitions. [2021-08-21 12:25:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:25:47,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 21 [2021-08-21 12:25:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:47,314 INFO L225 Difference]: With dead ends: 475 [2021-08-21 12:25:47,314 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:25:47,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:25:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:25:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 371. [2021-08-21 12:25:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.045945945945946) internal successors, (1127), 370 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1127 transitions. [2021-08-21 12:25:47,318 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1127 transitions. Word has length 21 [2021-08-21 12:25:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1127 transitions. [2021-08-21 12:25:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 12:25:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1127 transitions. [2021-08-21 12:25:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:47,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:47,319 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:47,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:47,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-08-21 12:25:47,522 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:47,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1157941808, now seen corresponding path program 209 times [2021-08-21 12:25:47,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:47,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195652991] [2021-08-21 12:25:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:47,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:47,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:47,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195652991] [2021-08-21 12:25:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195652991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:47,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023057738] [2021-08-21 12:25:47,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:25:47,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:47,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:47,627 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:47,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 12:25:52,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:25:52,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:52,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:52,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:52,054 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 32 treesize of output 28 [2021-08-21 12:25:52,108 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 19 treesize of output 15 [2021-08-21 12:25:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:52,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023057738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:52,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:52,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:25:52,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824681104] [2021-08-21 12:25:52,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:25:52,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:52,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:25:52,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:25:52,144 INFO L87 Difference]: Start difference. First operand 371 states and 1127 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 12:25:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:52,367 INFO L93 Difference]: Finished difference Result 708 states and 2091 transitions. [2021-08-21 12:25:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:25:52,368 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 21 [2021-08-21 12:25:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:52,369 INFO L225 Difference]: With dead ends: 708 [2021-08-21 12:25:52,369 INFO L226 Difference]: Without dead ends: 689 [2021-08-21 12:25:52,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:25:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-08-21 12:25:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 377. [2021-08-21 12:25:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.0718085106382977) internal successors, (1155), 376 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1155 transitions. [2021-08-21 12:25:52,374 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1155 transitions. Word has length 21 [2021-08-21 12:25:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:52,374 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1155 transitions. [2021-08-21 12:25:52,374 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 12:25:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1155 transitions. [2021-08-21 12:25:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:52,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:52,375 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:52,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2021-08-21 12:25:52,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:52,575 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1541633649, now seen corresponding path program 210 times [2021-08-21 12:25:52,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:52,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650583533] [2021-08-21 12:25:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:52,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:52,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650583533] [2021-08-21 12:25:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650583533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80955860] [2021-08-21 12:25:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:25:52,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:52,707 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:52,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 12:25:57,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:25:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:57,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:25:57,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:57,209 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 19 treesize of output 15 [2021-08-21 12:25:57,296 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 34 treesize of output 30 [2021-08-21 12:25:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:57,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80955860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:57,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:57,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:25:57,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542432892] [2021-08-21 12:25:57,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:25:57,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:25:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:25:57,338 INFO L87 Difference]: Start difference. First operand 377 states and 1155 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:57,664 INFO L93 Difference]: Finished difference Result 774 states and 2299 transitions. [2021-08-21 12:25:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:25:57,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:25:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:57,665 INFO L225 Difference]: With dead ends: 774 [2021-08-21 12:25:57,665 INFO L226 Difference]: Without dead ends: 735 [2021-08-21 12:25:57,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:25:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-08-21 12:25:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 379. [2021-08-21 12:25:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.0793650793650795) internal successors, (1164), 378 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1164 transitions. [2021-08-21 12:25:57,670 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1164 transitions. Word has length 21 [2021-08-21 12:25:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:57,670 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1164 transitions. [2021-08-21 12:25:57,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1164 transitions. [2021-08-21 12:25:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:25:57,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:57,671 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:57,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-21 12:25:57,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 12:25:57,897 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1194325296, now seen corresponding path program 211 times [2021-08-21 12:25:57,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:57,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989036002] [2021-08-21 12:25:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:57,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:58,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:58,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989036002] [2021-08-21 12:25:58,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989036002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:58,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102071534] [2021-08-21 12:25:58,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:25:58,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:58,028 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:58,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 12:26:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:02,406 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 32 treesize of output 28 [2021-08-21 12:26:02,522 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 19 treesize of output 15 [2021-08-21 12:26:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:02,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102071534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:02,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:02,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:26:02,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988530] [2021-08-21 12:26:02,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:26:02,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:02,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:26:02,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:26:02,564 INFO L87 Difference]: Start difference. First operand 379 states and 1164 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:03,029 INFO L93 Difference]: Finished difference Result 790 states and 2367 transitions. [2021-08-21 12:26:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:26:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:26:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:03,031 INFO L225 Difference]: With dead ends: 790 [2021-08-21 12:26:03,031 INFO L226 Difference]: Without dead ends: 771 [2021-08-21 12:26:03,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:26:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-21 12:26:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 381. [2021-08-21 12:26:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.0763157894736843) internal successors, (1169), 380 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1169 transitions. [2021-08-21 12:26:03,046 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1169 transitions. Word has length 21 [2021-08-21 12:26:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:03,046 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1169 transitions. [2021-08-21 12:26:03,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1169 transitions. [2021-08-21 12:26:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:03,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:03,046 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:03,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:03,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:03,260 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 196262096, now seen corresponding path program 212 times [2021-08-21 12:26:03,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:03,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33248250] [2021-08-21 12:26:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:03,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:03,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:03,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33248250] [2021-08-21 12:26:03,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33248250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:03,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731509267] [2021-08-21 12:26:03,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:26:03,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:03,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:03,390 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:03,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 12:26:07,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:26:07,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:07,939 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 32 treesize of output 28 [2021-08-21 12:26:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:26:07,996 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 17 treesize of output 13 [2021-08-21 12:26:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:08,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731509267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:08,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:08,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:26:08,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500453817] [2021-08-21 12:26:08,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:26:08,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:26:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:26:08,080 INFO L87 Difference]: Start difference. First operand 381 states and 1169 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:08,330 INFO L93 Difference]: Finished difference Result 688 states and 2066 transitions. [2021-08-21 12:26:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:26:08,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:26:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:08,332 INFO L225 Difference]: With dead ends: 688 [2021-08-21 12:26:08,332 INFO L226 Difference]: Without dead ends: 665 [2021-08-21 12:26:08,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:26:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-21 12:26:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 378. [2021-08-21 12:26:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.090185676392573) internal successors, (1165), 377 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1165 transitions. [2021-08-21 12:26:08,337 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1165 transitions. Word has length 21 [2021-08-21 12:26:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:08,337 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1165 transitions. [2021-08-21 12:26:08,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1165 transitions. [2021-08-21 12:26:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:08,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:08,337 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:08,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:08,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 12:26:08,553 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash 214132771, now seen corresponding path program 213 times [2021-08-21 12:26:08,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:08,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057707475] [2021-08-21 12:26:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:08,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:08,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:08,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057707475] [2021-08-21 12:26:08,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057707475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:08,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509844037] [2021-08-21 12:26:08,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:26:08,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:08,694 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:08,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 12:26:13,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:26:13,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:13,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:13,290 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:13,290 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-08-21 12:26:13,367 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 19 treesize of output 15 [2021-08-21 12:26:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509844037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:13,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:13,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:26:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693578919] [2021-08-21 12:26:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:26:13,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:13,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:26:13,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:26:13,385 INFO L87 Difference]: Start difference. First operand 378 states and 1165 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:26:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:13,521 INFO L93 Difference]: Finished difference Result 710 states and 2138 transitions. [2021-08-21 12:26:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:26:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 21 [2021-08-21 12:26:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:13,523 INFO L225 Difference]: With dead ends: 710 [2021-08-21 12:26:13,523 INFO L226 Difference]: Without dead ends: 688 [2021-08-21 12:26:13,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:26:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-21 12:26:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 381. [2021-08-21 12:26:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.086842105263158) internal successors, (1173), 380 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1173 transitions. [2021-08-21 12:26:13,528 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1173 transitions. Word has length 21 [2021-08-21 12:26:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:13,528 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1173 transitions. [2021-08-21 12:26:13,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:26:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1173 transitions. [2021-08-21 12:26:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:13,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:13,529 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:13,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-21 12:26:13,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 12:26:13,732 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash 355093033, now seen corresponding path program 214 times [2021-08-21 12:26:13,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:13,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943345251] [2021-08-21 12:26:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:13,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:13,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:13,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943345251] [2021-08-21 12:26:13,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943345251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:13,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117179403] [2021-08-21 12:26:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:26:13,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:13,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:13,836 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:13,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 12:26:18,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:26:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:18,361 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:18,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:26:18,448 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 19 treesize of output 15 [2021-08-21 12:26:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117179403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:18,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:26:18,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515344820] [2021-08-21 12:26:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:26:18,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:26:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:26:18,466 INFO L87 Difference]: Start difference. First operand 381 states and 1173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:26:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:18,623 INFO L93 Difference]: Finished difference Result 625 states and 1888 transitions. [2021-08-21 12:26:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:26:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 21 [2021-08-21 12:26:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:18,624 INFO L225 Difference]: With dead ends: 625 [2021-08-21 12:26:18,624 INFO L226 Difference]: Without dead ends: 603 [2021-08-21 12:26:18,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:26:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-08-21 12:26:18,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 384. [2021-08-21 12:26:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.08355091383812) internal successors, (1181), 383 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1181 transitions. [2021-08-21 12:26:18,629 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1181 transitions. Word has length 21 [2021-08-21 12:26:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:18,629 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1181 transitions. [2021-08-21 12:26:18,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:26:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1181 transitions. [2021-08-21 12:26:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:18,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:18,630 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:18,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:18,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:18,838 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash 285590325, now seen corresponding path program 215 times [2021-08-21 12:26:18,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:18,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570905111] [2021-08-21 12:26:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:18,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:18,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:18,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570905111] [2021-08-21 12:26:18,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570905111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:18,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739060082] [2021-08-21 12:26:18,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:26:18,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:18,959 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:18,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 12:26:23,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:26:23,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:23,486 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:23,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 31 [2021-08-21 12:26:23,569 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 21 treesize of output 17 [2021-08-21 12:26:23,571 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 17 treesize of output 13 [2021-08-21 12:26:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739060082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:23,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:23,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:26:23,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718024251] [2021-08-21 12:26:23,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:26:23,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:26:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:26:23,611 INFO L87 Difference]: Start difference. First operand 384 states and 1181 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:26:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:23,780 INFO L93 Difference]: Finished difference Result 631 states and 1901 transitions. [2021-08-21 12:26:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:26:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 21 [2021-08-21 12:26:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:23,781 INFO L225 Difference]: With dead ends: 631 [2021-08-21 12:26:23,781 INFO L226 Difference]: Without dead ends: 602 [2021-08-21 12:26:23,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:26:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-08-21 12:26:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 384. [2021-08-21 12:26:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.08355091383812) internal successors, (1181), 383 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1181 transitions. [2021-08-21 12:26:23,786 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1181 transitions. Word has length 21 [2021-08-21 12:26:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:23,786 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1181 transitions. [2021-08-21 12:26:23,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 12:26:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1181 transitions. [2021-08-21 12:26:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:23,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:23,786 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:23,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:23,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:23,997 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1888127447, now seen corresponding path program 216 times [2021-08-21 12:26:23,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:23,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391924286] [2021-08-21 12:26:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:23,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:24,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:24,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391924286] [2021-08-21 12:26:24,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391924286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:24,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978866332] [2021-08-21 12:26:24,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:26:24,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:24,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:24,106 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:24,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 12:26:28,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:26:28,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:28,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:28,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:28,719 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 17 treesize of output 13 [2021-08-21 12:26:28,771 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 19 treesize of output 15 [2021-08-21 12:26:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:28,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978866332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:28,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:28,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:26:28,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087212328] [2021-08-21 12:26:28,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:26:28,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:28,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:26:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:26:28,789 INFO L87 Difference]: Start difference. First operand 384 states and 1181 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 12:26:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:28,943 INFO L93 Difference]: Finished difference Result 521 states and 1580 transitions. [2021-08-21 12:26:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:26:28,943 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 21 [2021-08-21 12:26:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:28,944 INFO L225 Difference]: With dead ends: 521 [2021-08-21 12:26:28,944 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 12:26:28,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:26:28,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 12:26:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 390. [2021-08-21 12:26:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.089974293059126) internal successors, (1202), 389 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1202 transitions. [2021-08-21 12:26:28,948 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1202 transitions. Word has length 21 [2021-08-21 12:26:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:28,948 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1202 transitions. [2021-08-21 12:26:28,948 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 12:26:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1202 transitions. [2021-08-21 12:26:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:28,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:28,949 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:28,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:29,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-21 12:26:29,150 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:29,150 INFO L82 PathProgramCache]: Analyzing trace with hash 821031327, now seen corresponding path program 217 times [2021-08-21 12:26:29,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:29,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138126771] [2021-08-21 12:26:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:29,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:29,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:29,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138126771] [2021-08-21 12:26:29,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138126771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:29,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779334272] [2021-08-21 12:26:29,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:26:29,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:29,328 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:29,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 12:26:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:34,060 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 17 treesize of output 13 [2021-08-21 12:26:34,083 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 19 treesize of output 15 [2021-08-21 12:26:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:34,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779334272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:34,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:34,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:26:34,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352105968] [2021-08-21 12:26:34,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:26:34,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:26:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:26:34,121 INFO L87 Difference]: Start difference. First operand 390 states and 1202 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:34,231 INFO L93 Difference]: Finished difference Result 512 states and 1556 transitions. [2021-08-21 12:26:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:26:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:26:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:34,232 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:26:34,232 INFO L226 Difference]: Without dead ends: 490 [2021-08-21 12:26:34,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:26:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-21 12:26:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 387. [2021-08-21 12:26:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.082901554404145) internal successors, (1190), 386 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1190 transitions. [2021-08-21 12:26:34,236 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1190 transitions. Word has length 21 [2021-08-21 12:26:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:34,236 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1190 transitions. [2021-08-21 12:26:34,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1190 transitions. [2021-08-21 12:26:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:34,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:34,237 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:34,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:34,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 12:26:34,439 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1408776649, now seen corresponding path program 218 times [2021-08-21 12:26:34,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:34,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896312805] [2021-08-21 12:26:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:34,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:34,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:34,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896312805] [2021-08-21 12:26:34,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896312805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:34,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788065748] [2021-08-21 12:26:34,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:26:34,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:34,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:34,553 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:34,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 12:26:39,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:26:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:39,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 12:26:39,366 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 19 treesize of output 15 [2021-08-21 12:26:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788065748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:39,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:39,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:26:39,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716300801] [2021-08-21 12:26:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:26:39,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:26:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:26:39,405 INFO L87 Difference]: Start difference. First operand 387 states and 1190 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:39,548 INFO L93 Difference]: Finished difference Result 515 states and 1562 transitions. [2021-08-21 12:26:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:26:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:26:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:39,549 INFO L225 Difference]: With dead ends: 515 [2021-08-21 12:26:39,549 INFO L226 Difference]: Without dead ends: 493 [2021-08-21 12:26:39,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:26:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-21 12:26:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 384. [2021-08-21 12:26:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.08355091383812) internal successors, (1181), 383 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1181 transitions. [2021-08-21 12:26:39,554 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1181 transitions. Word has length 21 [2021-08-21 12:26:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:39,554 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1181 transitions. [2021-08-21 12:26:39,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1181 transitions. [2021-08-21 12:26:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:39,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:39,554 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:39,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:39,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-08-21 12:26:39,755 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:39,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1633067118, now seen corresponding path program 219 times [2021-08-21 12:26:39,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:39,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284267901] [2021-08-21 12:26:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:39,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:39,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:39,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284267901] [2021-08-21 12:26:39,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284267901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:39,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842002943] [2021-08-21 12:26:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:26:39,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:39,920 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:39,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 12:26:44,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:26:44,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:44,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:44,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:44,688 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 43 treesize of output 39 [2021-08-21 12:26:44,921 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:44,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-08-21 12:26:44,927 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:44,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:26:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:44,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842002943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:44,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:44,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:26:44,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086777636] [2021-08-21 12:26:44,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:26:44,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:26:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:26:44,986 INFO L87 Difference]: Start difference. First operand 384 states and 1181 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:45,582 INFO L93 Difference]: Finished difference Result 671 states and 2013 transitions. [2021-08-21 12:26:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:26:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:26:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:45,583 INFO L225 Difference]: With dead ends: 671 [2021-08-21 12:26:45,583 INFO L226 Difference]: Without dead ends: 652 [2021-08-21 12:26:45,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:26:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-21 12:26:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 391. [2021-08-21 12:26:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.1) internal successors, (1209), 390 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1209 transitions. [2021-08-21 12:26:45,589 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1209 transitions. Word has length 21 [2021-08-21 12:26:45,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:45,589 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1209 transitions. [2021-08-21 12:26:45,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1209 transitions. [2021-08-21 12:26:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:45,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:45,590 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:45,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:45,801 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash -112465395, now seen corresponding path program 220 times [2021-08-21 12:26:45,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:45,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491655577] [2021-08-21 12:26:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:45,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:45,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:45,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491655577] [2021-08-21 12:26:45,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491655577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:45,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110633078] [2021-08-21 12:26:45,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:26:45,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:45,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:45,974 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:45,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 12:26:50,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:26:50,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:50,690 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 35 treesize of output 31 [2021-08-21 12:26:50,853 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:50,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 39 [2021-08-21 12:26:50,858 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:50,858 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 32 treesize of output 31 [2021-08-21 12:26:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:50,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110633078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:50,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:50,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:26:50,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416492030] [2021-08-21 12:26:50,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:26:50,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:26:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:26:50,897 INFO L87 Difference]: Start difference. First operand 391 states and 1209 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:51,167 INFO L93 Difference]: Finished difference Result 714 states and 2134 transitions. [2021-08-21 12:26:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:26:51,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:26:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:51,168 INFO L225 Difference]: With dead ends: 714 [2021-08-21 12:26:51,168 INFO L226 Difference]: Without dead ends: 654 [2021-08-21 12:26:51,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:26:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-08-21 12:26:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 394. [2021-08-21 12:26:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0916030534351147) internal successors, (1215), 393 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1215 transitions. [2021-08-21 12:26:51,174 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1215 transitions. Word has length 21 [2021-08-21 12:26:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:51,174 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1215 transitions. [2021-08-21 12:26:51,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1215 transitions. [2021-08-21 12:26:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:51,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:51,175 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:51,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:51,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-08-21 12:26:51,389 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1663836978, now seen corresponding path program 221 times [2021-08-21 12:26:51,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:51,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955325005] [2021-08-21 12:26:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:51,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:51,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:51,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955325005] [2021-08-21 12:26:51,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955325005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:51,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031515173] [2021-08-21 12:26:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:26:51,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:51,551 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:51,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 12:26:56,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:26:56,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:26:56,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:56,336 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 43 treesize of output 39 [2021-08-21 12:26:56,501 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:56,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:26:56,507 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:26:56,507 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 23 treesize of output 22 [2021-08-21 12:26:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:56,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031515173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:56,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:56,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:26:56,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171782794] [2021-08-21 12:26:56,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:26:56,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:26:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:26:56,595 INFO L87 Difference]: Start difference. First operand 394 states and 1215 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:57,271 INFO L93 Difference]: Finished difference Result 741 states and 2226 transitions. [2021-08-21 12:26:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:26:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:26:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:57,272 INFO L225 Difference]: With dead ends: 741 [2021-08-21 12:26:57,272 INFO L226 Difference]: Without dead ends: 718 [2021-08-21 12:26:57,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:26:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-21 12:26:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 392. [2021-08-21 12:26:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0946291560102304) internal successors, (1210), 391 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1210 transitions. [2021-08-21 12:26:57,277 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1210 transitions. Word has length 21 [2021-08-21 12:26:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:57,277 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1210 transitions. [2021-08-21 12:26:57,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1210 transitions. [2021-08-21 12:26:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:26:57,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:57,278 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:57,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 12:26:57,486 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1320687327, now seen corresponding path program 222 times [2021-08-21 12:26:57,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:57,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464910335] [2021-08-21 12:26:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:57,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:57,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:57,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464910335] [2021-08-21 12:26:57,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464910335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:57,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011373385] [2021-08-21 12:26:57,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:26:57,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:57,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:57,627 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:57,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 12:27:02,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:27:02,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:02,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:02,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:02,416 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 30 treesize of output 26 [2021-08-21 12:27:02,619 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:02,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-08-21 12:27:02,625 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 16 [2021-08-21 12:27:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:02,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011373385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:02,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:02,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:27:02,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513105351] [2021-08-21 12:27:02,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:27:02,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:27:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:27:02,645 INFO L87 Difference]: Start difference. First operand 392 states and 1210 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:02,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:02,808 INFO L93 Difference]: Finished difference Result 537 states and 1632 transitions. [2021-08-21 12:27:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:27:02,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:02,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:02,809 INFO L225 Difference]: With dead ends: 537 [2021-08-21 12:27:02,809 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 12:27:02,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:27:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 12:27:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 395. [2021-08-21 12:27:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1015228426395938) internal successors, (1222), 394 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1222 transitions. [2021-08-21 12:27:02,813 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1222 transitions. Word has length 21 [2021-08-21 12:27:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:02,813 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1222 transitions. [2021-08-21 12:27:02,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1222 transitions. [2021-08-21 12:27:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:02,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:02,814 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:02,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:03,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 12:27:03,033 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:03,033 INFO L82 PathProgramCache]: Analyzing trace with hash -265121195, now seen corresponding path program 223 times [2021-08-21 12:27:03,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:03,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074735545] [2021-08-21 12:27:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:03,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:03,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:03,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074735545] [2021-08-21 12:27:03,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074735545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:03,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383921806] [2021-08-21 12:27:03,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:27:03,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:03,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:03,201 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:03,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 12:27:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:07,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:07,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:27:07,759 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 19 treesize of output 15 [2021-08-21 12:27:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383921806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:07,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:07,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:27:07,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283089290] [2021-08-21 12:27:07,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:27:07,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:27:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:27:07,798 INFO L87 Difference]: Start difference. First operand 395 states and 1222 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:07,935 INFO L93 Difference]: Finished difference Result 528 states and 1608 transitions. [2021-08-21 12:27:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:27:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:07,936 INFO L225 Difference]: With dead ends: 528 [2021-08-21 12:27:07,936 INFO L226 Difference]: Without dead ends: 506 [2021-08-21 12:27:07,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:27:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-21 12:27:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 392. [2021-08-21 12:27:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0946291560102304) internal successors, (1210), 391 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1210 transitions. [2021-08-21 12:27:07,941 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1210 transitions. Word has length 21 [2021-08-21 12:27:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:07,941 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1210 transitions. [2021-08-21 12:27:07,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1210 transitions. [2021-08-21 12:27:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:07,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:07,942 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:07,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:08,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 12:27:08,161 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1913959446, now seen corresponding path program 224 times [2021-08-21 12:27:08,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:08,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118909050] [2021-08-21 12:27:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:08,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:08,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:08,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118909050] [2021-08-21 12:27:08,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118909050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:08,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746568318] [2021-08-21 12:27:08,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:27:08,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:08,336 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:08,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 12:27:13,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:27:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:13,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:13,177 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 43 treesize of output 39 [2021-08-21 12:27:13,316 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:13,316 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 30 treesize of output 29 [2021-08-21 12:27:13,322 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 22 [2021-08-21 12:27:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:13,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746568318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:13,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:13,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:27:13,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343314208] [2021-08-21 12:27:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:27:13,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:27:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:27:13,397 INFO L87 Difference]: Start difference. First operand 392 states and 1210 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:14,021 INFO L93 Difference]: Finished difference Result 655 states and 1970 transitions. [2021-08-21 12:27:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:27:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:14,023 INFO L225 Difference]: With dead ends: 655 [2021-08-21 12:27:14,023 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 12:27:14,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:27:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 12:27:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 388. [2021-08-21 12:27:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.0852713178294575) internal successors, (1194), 387 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1194 transitions. [2021-08-21 12:27:14,028 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1194 transitions. Word has length 21 [2021-08-21 12:27:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:14,028 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1194 transitions. [2021-08-21 12:27:14,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1194 transitions. [2021-08-21 12:27:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:14,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:14,028 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:14,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:14,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:14,241 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash 844040781, now seen corresponding path program 225 times [2021-08-21 12:27:14,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:14,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729499531] [2021-08-21 12:27:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:14,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:14,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:14,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729499531] [2021-08-21 12:27:14,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729499531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:14,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795952749] [2021-08-21 12:27:14,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:27:14,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:14,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:14,366 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:14,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 12:27:19,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:27:19,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:19,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:27:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:19,274 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 35 treesize of output 31 [2021-08-21 12:27:19,468 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:19,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 44 [2021-08-21 12:27:19,473 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:19,473 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 37 treesize of output 36 [2021-08-21 12:27:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:19,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795952749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:19,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:19,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:27:19,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175289429] [2021-08-21 12:27:19,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:27:19,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:27:19,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:27:19,606 INFO L87 Difference]: Start difference. First operand 388 states and 1194 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:19,907 INFO L93 Difference]: Finished difference Result 507 states and 1534 transitions. [2021-08-21 12:27:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:27:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:19,908 INFO L225 Difference]: With dead ends: 507 [2021-08-21 12:27:19,908 INFO L226 Difference]: Without dead ends: 480 [2021-08-21 12:27:19,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:27:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-08-21 12:27:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 388. [2021-08-21 12:27:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.0852713178294575) internal successors, (1194), 387 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1194 transitions. [2021-08-21 12:27:19,912 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1194 transitions. Word has length 21 [2021-08-21 12:27:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:19,913 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1194 transitions. [2021-08-21 12:27:19,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1194 transitions. [2021-08-21 12:27:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:19,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:19,913 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:19,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2021-08-21 12:27:20,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:20,129 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:20,129 INFO L82 PathProgramCache]: Analyzing trace with hash -11515947, now seen corresponding path program 226 times [2021-08-21 12:27:20,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:20,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311412561] [2021-08-21 12:27:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:20,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:20,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:20,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311412561] [2021-08-21 12:27:20,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311412561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:20,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329845495] [2021-08-21 12:27:20,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:27:20,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:20,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:20,315 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:20,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 12:27:25,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:27:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:25,214 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 30 treesize of output 26 [2021-08-21 12:27:25,399 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:27:25,405 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 22 [2021-08-21 12:27:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329845495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:25,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:25,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:27:25,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884757585] [2021-08-21 12:27:25,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:27:25,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:27:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:27:25,446 INFO L87 Difference]: Start difference. First operand 388 states and 1194 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 12:27:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:25,630 INFO L93 Difference]: Finished difference Result 542 states and 1644 transitions. [2021-08-21 12:27:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:27:25,631 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 21 [2021-08-21 12:27:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:25,631 INFO L225 Difference]: With dead ends: 542 [2021-08-21 12:27:25,631 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 12:27:25,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:27:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 12:27:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 385. [2021-08-21 12:27:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0885416666666665) internal successors, (1186), 384 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1186 transitions. [2021-08-21 12:27:25,636 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1186 transitions. Word has length 21 [2021-08-21 12:27:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:25,636 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1186 transitions. [2021-08-21 12:27:25,636 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 12:27:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1186 transitions. [2021-08-21 12:27:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:25,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:25,637 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:25,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:25,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 12:27:25,837 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1891058358, now seen corresponding path program 227 times [2021-08-21 12:27:25,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:25,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893004962] [2021-08-21 12:27:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:25,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:26,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:26,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893004962] [2021-08-21 12:27:26,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893004962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:26,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115863801] [2021-08-21 12:27:26,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:27:26,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:26,035 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:26,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 12:27:30,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:27:30,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:30,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:30,918 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 32 treesize of output 28 [2021-08-21 12:27:30,945 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 21 treesize of output 17 [2021-08-21 12:27:30,947 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 17 treesize of output 13 [2021-08-21 12:27:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:31,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115863801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:31,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:31,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:27:31,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423056142] [2021-08-21 12:27:31,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:27:31,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:31,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:27:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:27:31,026 INFO L87 Difference]: Start difference. First operand 385 states and 1186 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:31,180 INFO L93 Difference]: Finished difference Result 542 states and 1645 transitions. [2021-08-21 12:27:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:27:31,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:31,181 INFO L225 Difference]: With dead ends: 542 [2021-08-21 12:27:31,181 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 12:27:31,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:27:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 12:27:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 385. [2021-08-21 12:27:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0885416666666665) internal successors, (1186), 384 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1186 transitions. [2021-08-21 12:27:31,186 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1186 transitions. Word has length 21 [2021-08-21 12:27:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:31,186 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1186 transitions. [2021-08-21 12:27:31,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1186 transitions. [2021-08-21 12:27:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:31,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:31,213 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:31,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2021-08-21 12:27:31,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-21 12:27:31,429 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1800667941, now seen corresponding path program 228 times [2021-08-21 12:27:31,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:31,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278405792] [2021-08-21 12:27:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:31,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:31,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:31,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278405792] [2021-08-21 12:27:31,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278405792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:31,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010385710] [2021-08-21 12:27:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:27:31,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:31,604 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:31,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 12:27:36,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:27:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:36,641 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 35 treesize of output 31 [2021-08-21 12:27:36,689 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:36,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 49 [2021-08-21 12:27:36,695 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:36,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:27:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:36,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010385710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:36,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:36,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:27:36,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372821750] [2021-08-21 12:27:36,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:27:36,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:27:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:27:36,832 INFO L87 Difference]: Start difference. First operand 385 states and 1186 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:37,281 INFO L93 Difference]: Finished difference Result 637 states and 1912 transitions. [2021-08-21 12:27:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:27:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:37,282 INFO L225 Difference]: With dead ends: 637 [2021-08-21 12:27:37,282 INFO L226 Difference]: Without dead ends: 610 [2021-08-21 12:27:37,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:27:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-08-21 12:27:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 386. [2021-08-21 12:27:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0961038961038962) internal successors, (1192), 385 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1192 transitions. [2021-08-21 12:27:37,287 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1192 transitions. Word has length 21 [2021-08-21 12:27:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:37,287 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1192 transitions. [2021-08-21 12:27:37,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1192 transitions. [2021-08-21 12:27:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:37,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:37,288 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:37,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:37,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:37,497 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash -646058551, now seen corresponding path program 229 times [2021-08-21 12:27:37,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:37,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296397659] [2021-08-21 12:27:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:37,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:37,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:37,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296397659] [2021-08-21 12:27:37,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296397659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:37,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950984883] [2021-08-21 12:27:37,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:27:37,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:37,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:37,598 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:37,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 12:27:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:42,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:42,439 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 19 treesize of output 15 [2021-08-21 12:27:42,469 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 21 treesize of output 17 [2021-08-21 12:27:42,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 12:27:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:42,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950984883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:42,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:42,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:27:42,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840716526] [2021-08-21 12:27:42,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:27:42,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:27:42,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:42,546 INFO L87 Difference]: Start difference. First operand 386 states and 1192 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:42,682 INFO L93 Difference]: Finished difference Result 545 states and 1650 transitions. [2021-08-21 12:27:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:27:42,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:42,683 INFO L225 Difference]: With dead ends: 545 [2021-08-21 12:27:42,683 INFO L226 Difference]: Without dead ends: 516 [2021-08-21 12:27:42,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-21 12:27:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 384. [2021-08-21 12:27:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.08355091383812) internal successors, (1181), 383 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1181 transitions. [2021-08-21 12:27:42,688 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1181 transitions. Word has length 21 [2021-08-21 12:27:42,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:42,688 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1181 transitions. [2021-08-21 12:27:42,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1181 transitions. [2021-08-21 12:27:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:42,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:42,688 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:42,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:42,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:42,897 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1810346795, now seen corresponding path program 230 times [2021-08-21 12:27:42,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:42,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452711040] [2021-08-21 12:27:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:42,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:43,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:43,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452711040] [2021-08-21 12:27:43,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452711040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:43,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524371788] [2021-08-21 12:27:43,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:27:43,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:43,040 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:43,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 12:27:47,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:27:47,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:47,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:47,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:47,943 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:47,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:27:48,070 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:48,070 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-21 12:27:48,077 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:48,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:27:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:48,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524371788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:48,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:48,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:27:48,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774191069] [2021-08-21 12:27:48,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:27:48,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:27:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:27:48,120 INFO L87 Difference]: Start difference. First operand 384 states and 1181 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 12:27:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,307 INFO L93 Difference]: Finished difference Result 517 states and 1564 transitions. [2021-08-21 12:27:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:27:48,308 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 21 [2021-08-21 12:27:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,309 INFO L225 Difference]: With dead ends: 517 [2021-08-21 12:27:48,309 INFO L226 Difference]: Without dead ends: 495 [2021-08-21 12:27:48,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-21 12:27:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 386. [2021-08-21 12:27:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0805194805194804) internal successors, (1186), 385 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1186 transitions. [2021-08-21 12:27:48,313 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1186 transitions. Word has length 21 [2021-08-21 12:27:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,313 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1186 transitions. [2021-08-21 12:27:48,313 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 12:27:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1186 transitions. [2021-08-21 12:27:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:48,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,314 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:48,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:48,515 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash 830280268, now seen corresponding path program 231 times [2021-08-21 12:27:48,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628713676] [2021-08-21 12:27:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:48,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628713676] [2021-08-21 12:27:48,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628713676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:48,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616900590] [2021-08-21 12:27:48,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:27:48,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:48,690 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:48,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 12:27:53,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:27:53,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:53,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:27:53,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:53,617 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:53,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 37 [2021-08-21 12:27:53,672 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 treesize of output 52 [2021-08-21 12:27:53,679 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:27:53,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 41 [2021-08-21 12:27:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:53,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616900590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:53,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:53,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:27:53,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526534897] [2021-08-21 12:27:53,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:27:53,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:27:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:27:53,817 INFO L87 Difference]: Start difference. First operand 386 states and 1186 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,800 INFO L93 Difference]: Finished difference Result 735 states and 2195 transitions. [2021-08-21 12:27:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:27:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:27:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,802 INFO L225 Difference]: With dead ends: 735 [2021-08-21 12:27:54,802 INFO L226 Difference]: Without dead ends: 712 [2021-08-21 12:27:54,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 629.1ms TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:27:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-08-21 12:27:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 386. [2021-08-21 12:27:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0805194805194804) internal successors, (1186), 385 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1186 transitions. [2021-08-21 12:27:54,807 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1186 transitions. Word has length 21 [2021-08-21 12:27:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,807 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1186 transitions. [2021-08-21 12:27:54,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1186 transitions. [2021-08-21 12:27:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:27:54,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,808 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:54,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:55,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:55,008 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:55,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1433521265, now seen corresponding path program 232 times [2021-08-21 12:27:55,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:55,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657358563] [2021-08-21 12:27:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:55,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:55,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657358563] [2021-08-21 12:27:55,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657358563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:55,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270457795] [2021-08-21 12:27:55,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:27:55,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:55,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:55,144 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:55,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 12:28:00,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:00,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:00,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:00,086 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 32 treesize of output 28 [2021-08-21 12:28:00,116 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 21 treesize of output 17 [2021-08-21 12:28:00,118 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 17 treesize of output 13 [2021-08-21 12:28:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:00,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270457795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:00,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:00,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:28:00,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773043945] [2021-08-21 12:28:00,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:28:00,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:28:00,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:28:00,228 INFO L87 Difference]: Start difference. First operand 386 states and 1186 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,429 INFO L93 Difference]: Finished difference Result 551 states and 1649 transitions. [2021-08-21 12:28:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:28:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:28:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,430 INFO L225 Difference]: With dead ends: 551 [2021-08-21 12:28:00,430 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 12:28:00,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 12:28:00,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 399. [2021-08-21 12:28:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.100502512562814) internal successors, (1234), 398 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1234 transitions. [2021-08-21 12:28:00,435 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1234 transitions. Word has length 21 [2021-08-21 12:28:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,435 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1234 transitions. [2021-08-21 12:28:00,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1234 transitions. [2021-08-21 12:28:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:00,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,435 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:00,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:00,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-21 12:28:00,636 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1706836641, now seen corresponding path program 233 times [2021-08-21 12:28:00,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343740412] [2021-08-21 12:28:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:00,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343740412] [2021-08-21 12:28:00,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343740412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:00,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771562405] [2021-08-21 12:28:00,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:00,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:00,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:00,838 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:00,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 12:28:05,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:05,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:05,907 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:05,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:28:05,984 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:05,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 36 [2021-08-21 12:28:06,001 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:06,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:28:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:06,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771562405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:06,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:06,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:28:06,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658203365] [2021-08-21 12:28:06,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:28:06,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:28:06,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:06,061 INFO L87 Difference]: Start difference. First operand 399 states and 1234 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:28:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:06,236 INFO L93 Difference]: Finished difference Result 544 states and 1650 transitions. [2021-08-21 12:28:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:28:06,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 21 [2021-08-21 12:28:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:06,237 INFO L225 Difference]: With dead ends: 544 [2021-08-21 12:28:06,237 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 12:28:06,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:28:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 12:28:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 398. [2021-08-21 12:28:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.093198992443325) internal successors, (1228), 397 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1228 transitions. [2021-08-21 12:28:06,242 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1228 transitions. Word has length 21 [2021-08-21 12:28:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:06,242 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1228 transitions. [2021-08-21 12:28:06,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:28:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1228 transitions. [2021-08-21 12:28:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:06,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:06,242 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:06,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2021-08-21 12:28:06,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:06,445 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:06,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:06,445 INFO L82 PathProgramCache]: Analyzing trace with hash -40628851, now seen corresponding path program 234 times [2021-08-21 12:28:06,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:06,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863568266] [2021-08-21 12:28:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:06,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:06,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:06,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863568266] [2021-08-21 12:28:06,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863568266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:06,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76806516] [2021-08-21 12:28:06,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:06,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:06,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:06,576 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:06,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 12:28:11,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:28:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:11,624 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 32 treesize of output 28 [2021-08-21 12:28:11,666 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 19 treesize of output 15 [2021-08-21 12:28:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:11,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76806516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:11,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:11,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:28:11,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441121875] [2021-08-21 12:28:11,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:28:11,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:28:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:11,700 INFO L87 Difference]: Start difference. First operand 398 states and 1228 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:28:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:11,834 INFO L93 Difference]: Finished difference Result 493 states and 1485 transitions. [2021-08-21 12:28:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:28:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 21 [2021-08-21 12:28:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:11,835 INFO L225 Difference]: With dead ends: 493 [2021-08-21 12:28:11,835 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 12:28:11,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:28:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 12:28:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 384. [2021-08-21 12:28:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0783289817232378) internal successors, (1179), 383 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1179 transitions. [2021-08-21 12:28:11,839 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1179 transitions. Word has length 21 [2021-08-21 12:28:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:11,839 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1179 transitions. [2021-08-21 12:28:11,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 12:28:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1179 transitions. [2021-08-21 12:28:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:11,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:11,840 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:11,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:12,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 12:28:12,061 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash -175037118, now seen corresponding path program 235 times [2021-08-21 12:28:12,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:12,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309938938] [2021-08-21 12:28:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:12,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:12,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:12,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309938938] [2021-08-21 12:28:12,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309938938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:12,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271022517] [2021-08-21 12:28:12,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:28:12,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:12,168 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:12,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 12:28:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:17,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:17,207 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:17,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 29 [2021-08-21 12:28:17,275 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 19 treesize of output 15 [2021-08-21 12:28:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:17,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271022517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:17,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:17,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:28:17,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732915894] [2021-08-21 12:28:17,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:28:17,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:28:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:28:17,305 INFO L87 Difference]: Start difference. First operand 384 states and 1179 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 12:28:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:17,551 INFO L93 Difference]: Finished difference Result 762 states and 2283 transitions. [2021-08-21 12:28:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:28:17,551 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 21 [2021-08-21 12:28:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:17,552 INFO L225 Difference]: With dead ends: 762 [2021-08-21 12:28:17,552 INFO L226 Difference]: Without dead ends: 743 [2021-08-21 12:28:17,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:28:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-08-21 12:28:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 392. [2021-08-21 12:28:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0971867007672635) internal successors, (1211), 391 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1211 transitions. [2021-08-21 12:28:17,558 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1211 transitions. Word has length 21 [2021-08-21 12:28:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:17,558 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1211 transitions. [2021-08-21 12:28:17,558 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 12:28:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1211 transitions. [2021-08-21 12:28:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:17,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:17,558 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:17,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:17,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 12:28:17,781 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1770428957, now seen corresponding path program 236 times [2021-08-21 12:28:17,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:17,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559891750] [2021-08-21 12:28:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:17,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:17,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:17,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559891750] [2021-08-21 12:28:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559891750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:17,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015467537] [2021-08-21 12:28:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:17,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:17,884 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:17,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 12:28:22,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:22,876 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 19 treesize of output 15 [2021-08-21 12:28:22,910 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 34 treesize of output 30 [2021-08-21 12:28:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:22,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015467537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:22,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:22,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:28:22,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345363601] [2021-08-21 12:28:22,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:28:22,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:22,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:28:22,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:22,959 INFO L87 Difference]: Start difference. First operand 392 states and 1211 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 12:28:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:23,081 INFO L93 Difference]: Finished difference Result 653 states and 1965 transitions. [2021-08-21 12:28:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:28:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 21 [2021-08-21 12:28:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:23,082 INFO L225 Difference]: With dead ends: 653 [2021-08-21 12:28:23,082 INFO L226 Difference]: Without dead ends: 614 [2021-08-21 12:28:23,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-08-21 12:28:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 396. [2021-08-21 12:28:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.0936708860759494) internal successors, (1222), 395 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1222 transitions. [2021-08-21 12:28:23,087 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1222 transitions. Word has length 21 [2021-08-21 12:28:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:23,087 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1222 transitions. [2021-08-21 12:28:23,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 12:28:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1222 transitions. [2021-08-21 12:28:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:23,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:23,087 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:23,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2021-08-21 12:28:23,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-08-21 12:28:23,313 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2117737310, now seen corresponding path program 237 times [2021-08-21 12:28:23,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:23,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063931583] [2021-08-21 12:28:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:23,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:23,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:23,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063931583] [2021-08-21 12:28:23,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063931583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:23,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280024896] [2021-08-21 12:28:23,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:23,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:23,424 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:23,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 12:28:28,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:28:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:28,508 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 19 treesize of output 15 [2021-08-21 12:28:28,599 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 19 treesize of output 15 [2021-08-21 12:28:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280024896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:28,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:28,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:28:28,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944892358] [2021-08-21 12:28:28,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:28:28,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:28:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:28,630 INFO L87 Difference]: Start difference. First operand 396 states and 1222 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:29,237 INFO L93 Difference]: Finished difference Result 904 states and 2723 transitions. [2021-08-21 12:28:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:28:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:28:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:29,238 INFO L225 Difference]: With dead ends: 904 [2021-08-21 12:28:29,238 INFO L226 Difference]: Without dead ends: 885 [2021-08-21 12:28:29,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 442.8ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:28:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-08-21 12:28:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 406. [2021-08-21 12:28:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.108641975308642) internal successors, (1259), 405 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1259 transitions. [2021-08-21 12:28:29,244 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1259 transitions. Word has length 21 [2021-08-21 12:28:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:29,244 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1259 transitions. [2021-08-21 12:28:29,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1259 transitions. [2021-08-21 12:28:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:29,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:29,245 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:29,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:29,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:29,446 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1179166786, now seen corresponding path program 238 times [2021-08-21 12:28:29,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:29,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766323333] [2021-08-21 12:28:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:29,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:29,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:29,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766323333] [2021-08-21 12:28:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766323333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:29,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551907937] [2021-08-21 12:28:29,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:29,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:29,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:29,601 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:29,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 12:28:34,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:34,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:34,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:34,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:34,762 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:34,763 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 30 treesize of output 29 [2021-08-21 12:28:34,827 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 21 treesize of output 17 [2021-08-21 12:28:34,829 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 17 treesize of output 13 [2021-08-21 12:28:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:34,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551907937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:34,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:34,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:28:34,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475326761] [2021-08-21 12:28:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:28:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:28:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:28:34,903 INFO L87 Difference]: Start difference. First operand 406 states and 1259 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:35,197 INFO L93 Difference]: Finished difference Result 834 states and 2521 transitions. [2021-08-21 12:28:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:28:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:28:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:35,198 INFO L225 Difference]: With dead ends: 834 [2021-08-21 12:28:35,198 INFO L226 Difference]: Without dead ends: 811 [2021-08-21 12:28:35,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:28:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-08-21 12:28:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 415. [2021-08-21 12:28:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.13768115942029) internal successors, (1299), 414 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1299 transitions. [2021-08-21 12:28:35,204 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1299 transitions. Word has length 21 [2021-08-21 12:28:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:35,204 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1299 transitions. [2021-08-21 12:28:35,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1299 transitions. [2021-08-21 12:28:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:35,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:35,205 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:35,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:35,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:35,415 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1197037461, now seen corresponding path program 239 times [2021-08-21 12:28:35,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:35,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686546572] [2021-08-21 12:28:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:35,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:35,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:35,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686546572] [2021-08-21 12:28:35,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686546572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:35,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144774997] [2021-08-21 12:28:35,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:35,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:35,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:35,521 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:35,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 12:28:40,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:28:40,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:40,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-08-21 12:28:40,743 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 19 treesize of output 15 [2021-08-21 12:28:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144774997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:40,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:40,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:28:40,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978993798] [2021-08-21 12:28:40,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:28:40,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:40,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:28:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:40,762 INFO L87 Difference]: Start difference. First operand 415 states and 1299 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:28:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:40,900 INFO L93 Difference]: Finished difference Result 683 states and 2074 transitions. [2021-08-21 12:28:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:28:40,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:28:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:40,901 INFO L225 Difference]: With dead ends: 683 [2021-08-21 12:28:40,901 INFO L226 Difference]: Without dead ends: 661 [2021-08-21 12:28:40,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-21 12:28:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 418. [2021-08-21 12:28:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.1342925659472423) internal successors, (1307), 417 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1307 transitions. [2021-08-21 12:28:40,906 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1307 transitions. Word has length 21 [2021-08-21 12:28:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:40,906 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1307 transitions. [2021-08-21 12:28:40,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:28:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1307 transitions. [2021-08-21 12:28:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:40,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:40,907 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:40,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:41,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:41,108 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1337997723, now seen corresponding path program 240 times [2021-08-21 12:28:41,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:41,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473215910] [2021-08-21 12:28:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:41,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:41,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:41,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473215910] [2021-08-21 12:28:41,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473215910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:41,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534922774] [2021-08-21 12:28:41,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:41,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:41,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:41,224 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:41,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 12:28:46,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:28:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:46,350 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 32 treesize of output 28 [2021-08-21 12:28:46,412 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 19 treesize of output 15 [2021-08-21 12:28:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:46,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534922774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:46,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:46,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:28:46,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183289346] [2021-08-21 12:28:46,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:28:46,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:28:46,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:46,430 INFO L87 Difference]: Start difference. First operand 418 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:28:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:46,571 INFO L93 Difference]: Finished difference Result 680 states and 2083 transitions. [2021-08-21 12:28:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:28:46,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:28:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:46,572 INFO L225 Difference]: With dead ends: 680 [2021-08-21 12:28:46,572 INFO L226 Difference]: Without dead ends: 658 [2021-08-21 12:28:46,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-08-21 12:28:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 421. [2021-08-21 12:28:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.130952380952381) internal successors, (1315), 420 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1315 transitions. [2021-08-21 12:28:46,578 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1315 transitions. Word has length 21 [2021-08-21 12:28:46,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:46,578 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1315 transitions. [2021-08-21 12:28:46,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:28:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1315 transitions. [2021-08-21 12:28:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:46,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:46,579 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:46,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:46,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:46,801 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1268495015, now seen corresponding path program 241 times [2021-08-21 12:28:46,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:46,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099595905] [2021-08-21 12:28:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:46,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:46,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:46,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099595905] [2021-08-21 12:28:46,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099595905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:46,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649808752] [2021-08-21 12:28:46,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:28:46,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:46,922 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:46,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 12:28:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:51,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:51,992 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 32 treesize of output 28 [2021-08-21 12:28:52,036 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 21 treesize of output 17 [2021-08-21 12:28:52,037 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 17 treesize of output 13 [2021-08-21 12:28:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649808752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:52,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:28:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25429406] [2021-08-21 12:28:52,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:28:52,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:28:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:52,097 INFO L87 Difference]: Start difference. First operand 421 states and 1315 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:28:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:52,237 INFO L93 Difference]: Finished difference Result 681 states and 2078 transitions. [2021-08-21 12:28:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:28:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:28:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:52,238 INFO L225 Difference]: With dead ends: 681 [2021-08-21 12:28:52,238 INFO L226 Difference]: Without dead ends: 652 [2021-08-21 12:28:52,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-21 12:28:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 412. [2021-08-21 12:28:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.121654501216545) internal successors, (1283), 411 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1283 transitions. [2021-08-21 12:28:52,244 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1283 transitions. Word has length 21 [2021-08-21 12:28:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:52,244 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1283 transitions. [2021-08-21 12:28:52,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:28:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1283 transitions. [2021-08-21 12:28:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:52,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:52,244 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:52,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:52,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:52,473 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash 513973068, now seen corresponding path program 242 times [2021-08-21 12:28:52,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:52,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149425782] [2021-08-21 12:28:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:52,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:52,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:52,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149425782] [2021-08-21 12:28:52,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149425782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:52,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783164122] [2021-08-21 12:28:52,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:52,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:52,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:52,580 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:52,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 12:28:57,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:57,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:57,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:28:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:57,822 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 17 treesize of output 13 [2021-08-21 12:28:57,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:28:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:57,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783164122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:57,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:57,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:28:57,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772027093] [2021-08-21 12:28:57,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:28:57,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:28:57,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:28:57,921 INFO L87 Difference]: Start difference. First operand 412 states and 1283 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:58,586 INFO L93 Difference]: Finished difference Result 815 states and 2447 transitions. [2021-08-21 12:28:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:28:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:28:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:58,587 INFO L225 Difference]: With dead ends: 815 [2021-08-21 12:28:58,587 INFO L226 Difference]: Without dead ends: 792 [2021-08-21 12:28:58,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:28:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-08-21 12:28:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 400. [2021-08-21 12:28:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0852130325814535) internal successors, (1231), 399 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1231 transitions. [2021-08-21 12:28:58,593 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1231 transitions. Word has length 21 [2021-08-21 12:28:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:58,593 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1231 transitions. [2021-08-21 12:28:58,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1231 transitions. [2021-08-21 12:28:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:28:58,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:58,593 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:58,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2021-08-21 12:28:58,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:58,813 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash 585430622, now seen corresponding path program 243 times [2021-08-21 12:28:58,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:58,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038023209] [2021-08-21 12:28:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:58,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:58,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:58,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038023209] [2021-08-21 12:28:58,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038023209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:58,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677082135] [2021-08-21 12:28:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:58,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:58,994 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:58,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 12:29:04,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:29:04,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:04,207 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 17 treesize of output 13 [2021-08-21 12:29:04,229 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 19 treesize of output 15 [2021-08-21 12:29:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:04,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677082135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:04,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:04,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:29:04,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462621345] [2021-08-21 12:29:04,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:29:04,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:29:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:29:04,298 INFO L87 Difference]: Start difference. First operand 400 states and 1231 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:04,515 INFO L93 Difference]: Finished difference Result 621 states and 1874 transitions. [2021-08-21 12:29:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:29:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:04,517 INFO L225 Difference]: With dead ends: 621 [2021-08-21 12:29:04,517 INFO L226 Difference]: Without dead ends: 602 [2021-08-21 12:29:04,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:29:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-08-21 12:29:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 401. [2021-08-21 12:29:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0975) internal successors, (1239), 400 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1239 transitions. [2021-08-21 12:29:04,535 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1239 transitions. Word has length 21 [2021-08-21 12:29:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:04,536 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1239 transitions. [2021-08-21 12:29:04,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1239 transitions. [2021-08-21 12:29:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:04,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:04,540 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:04,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:04,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:04,761 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:04,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1695628131, now seen corresponding path program 244 times [2021-08-21 12:29:04,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:04,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831900975] [2021-08-21 12:29:04,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:04,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:04,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:04,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831900975] [2021-08-21 12:29:04,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831900975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:04,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129661991] [2021-08-21 12:29:04,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:29:04,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:04,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:04,970 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:04,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 12:29:10,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:29:10,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:10,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:10,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:10,179 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 19 treesize of output 15 [2021-08-21 12:29:10,221 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 34 treesize of output 30 [2021-08-21 12:29:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:10,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129661991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:10,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:10,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:29:10,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588256072] [2021-08-21 12:29:10,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:29:10,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:29:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:29:10,276 INFO L87 Difference]: Start difference. First operand 401 states and 1239 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:10,522 INFO L93 Difference]: Finished difference Result 675 states and 2022 transitions. [2021-08-21 12:29:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:29:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:10,524 INFO L225 Difference]: With dead ends: 675 [2021-08-21 12:29:10,524 INFO L226 Difference]: Without dead ends: 615 [2021-08-21 12:29:10,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:29:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-21 12:29:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 411. [2021-08-21 12:29:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.1) internal successors, (1271), 410 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1271 transitions. [2021-08-21 12:29:10,529 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1271 transitions. Word has length 21 [2021-08-21 12:29:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:10,529 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1271 transitions. [2021-08-21 12:29:10,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1271 transitions. [2021-08-21 12:29:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:10,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:10,530 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:10,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 12:29:10,731 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1846884373, now seen corresponding path program 245 times [2021-08-21 12:29:10,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:10,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405090818] [2021-08-21 12:29:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:10,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:10,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:10,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405090818] [2021-08-21 12:29:10,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405090818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:10,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840975949] [2021-08-21 12:29:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:29:10,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:10,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:10,843 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:10,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-21 12:29:15,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:29:15,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:16,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:16,060 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 32 treesize of output 28 [2021-08-21 12:29:16,087 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 19 treesize of output 15 [2021-08-21 12:29:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:16,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840975949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:16,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:16,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:29:16,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613900628] [2021-08-21 12:29:16,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:29:16,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:29:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:29:16,103 INFO L87 Difference]: Start difference. First operand 411 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:29:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:16,231 INFO L93 Difference]: Finished difference Result 514 states and 1568 transitions. [2021-08-21 12:29:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:29:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:16,232 INFO L225 Difference]: With dead ends: 514 [2021-08-21 12:29:16,232 INFO L226 Difference]: Without dead ends: 492 [2021-08-21 12:29:16,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:29:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-21 12:29:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 411. [2021-08-21 12:29:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.1) internal successors, (1271), 410 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1271 transitions. [2021-08-21 12:29:16,236 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1271 transitions. Word has length 21 [2021-08-21 12:29:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:16,237 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1271 transitions. [2021-08-21 12:29:16,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:29:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1271 transitions. [2021-08-21 12:29:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:16,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:16,237 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:16,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:16,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-21 12:29:16,453 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1662028903, now seen corresponding path program 246 times [2021-08-21 12:29:16,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:16,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358584641] [2021-08-21 12:29:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:16,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:16,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:16,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358584641] [2021-08-21 12:29:16,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358584641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:16,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799070055] [2021-08-21 12:29:16,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:29:16,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:16,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:16,554 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:16,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-21 12:29:21,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:29:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:21,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:21,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:21,605 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 19 treesize of output 15 [2021-08-21 12:29:21,623 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 34 treesize of output 30 [2021-08-21 12:29:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:21,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799070055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:21,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:21,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:29:21,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523252979] [2021-08-21 12:29:21,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:29:21,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:29:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:29:21,673 INFO L87 Difference]: Start difference. First operand 411 states and 1271 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:21,868 INFO L93 Difference]: Finished difference Result 715 states and 2140 transitions. [2021-08-21 12:29:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:29:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:21,869 INFO L225 Difference]: With dead ends: 715 [2021-08-21 12:29:21,869 INFO L226 Difference]: Without dead ends: 661 [2021-08-21 12:29:21,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:29:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-21 12:29:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 415. [2021-08-21 12:29:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.1207729468599035) internal successors, (1292), 414 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1292 transitions. [2021-08-21 12:29:21,875 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1292 transitions. Word has length 21 [2021-08-21 12:29:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:21,875 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1292 transitions. [2021-08-21 12:29:21,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1292 transitions. [2021-08-21 12:29:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:21,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:21,875 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:21,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:22,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-08-21 12:29:22,101 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:22,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1777381665, now seen corresponding path program 247 times [2021-08-21 12:29:22,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:22,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651992222] [2021-08-21 12:29:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:22,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:22,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:22,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651992222] [2021-08-21 12:29:22,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651992222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:22,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714884153] [2021-08-21 12:29:22,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:29:22,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:22,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:22,183 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:22,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-21 12:29:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:27,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:27,328 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 32 treesize of output 28 [2021-08-21 12:29:27,339 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 21 treesize of output 17 [2021-08-21 12:29:27,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 12:29:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:27,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714884153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:27,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:27,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:29:27,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981616806] [2021-08-21 12:29:27,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:29:27,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:29:27,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:29:27,366 INFO L87 Difference]: Start difference. First operand 415 states and 1292 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:29:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:27,466 INFO L93 Difference]: Finished difference Result 563 states and 1723 transitions. [2021-08-21 12:29:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:29:27,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:27,467 INFO L225 Difference]: With dead ends: 563 [2021-08-21 12:29:27,467 INFO L226 Difference]: Without dead ends: 534 [2021-08-21 12:29:27,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:29:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-21 12:29:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 412. [2021-08-21 12:29:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.124087591240876) internal successors, (1284), 411 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1284 transitions. [2021-08-21 12:29:27,472 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1284 transitions. Word has length 21 [2021-08-21 12:29:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:27,472 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1284 transitions. [2021-08-21 12:29:27,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 12:29:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1284 transitions. [2021-08-21 12:29:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:27,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:27,473 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:27,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:27,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:27,673 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:27,674 INFO L82 PathProgramCache]: Analyzing trace with hash 444755217, now seen corresponding path program 248 times [2021-08-21 12:29:27,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:27,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703436451] [2021-08-21 12:29:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:27,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:27,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:27,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703436451] [2021-08-21 12:29:27,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703436451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:27,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48820330] [2021-08-21 12:29:27,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:29:27,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:27,813 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:27,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-21 12:29:33,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:29:33,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:33,111 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 32 treesize of output 28 [2021-08-21 12:29:33,136 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 21 treesize of output 17 [2021-08-21 12:29:33,137 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 17 treesize of output 13 [2021-08-21 12:29:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:33,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48820330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:33,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:33,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:29:33,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153242789] [2021-08-21 12:29:33,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:29:33,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:29:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:29:33,202 INFO L87 Difference]: Start difference. First operand 412 states and 1284 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:33,471 INFO L93 Difference]: Finished difference Result 771 states and 2293 transitions. [2021-08-21 12:29:33,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:29:33,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:33,472 INFO L225 Difference]: With dead ends: 771 [2021-08-21 12:29:33,472 INFO L226 Difference]: Without dead ends: 717 [2021-08-21 12:29:33,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:29:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-08-21 12:29:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 432. [2021-08-21 12:29:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1508120649651974) internal successors, (1358), 431 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1358 transitions. [2021-08-21 12:29:33,485 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1358 transitions. Word has length 21 [2021-08-21 12:29:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:33,485 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1358 transitions. [2021-08-21 12:29:33,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1358 transitions. [2021-08-21 12:29:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:33,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:33,486 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:33,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:33,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-08-21 12:29:33,709 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash -410801511, now seen corresponding path program 249 times [2021-08-21 12:29:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:33,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169257390] [2021-08-21 12:29:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:33,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:33,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:33,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169257390] [2021-08-21 12:29:33,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169257390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:33,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932363247] [2021-08-21 12:29:33,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:29:33,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:33,861 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:33,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-21 12:29:39,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:29:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:39,131 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 19 treesize of output 15 [2021-08-21 12:29:39,154 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 33 treesize of output 29 [2021-08-21 12:29:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:39,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932363247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:39,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:39,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 12:29:39,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844853966] [2021-08-21 12:29:39,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:29:39,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:29:39,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:29:39,203 INFO L87 Difference]: Start difference. First operand 432 states and 1358 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:39,394 INFO L93 Difference]: Finished difference Result 551 states and 1697 transitions. [2021-08-21 12:29:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:29:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:39,395 INFO L225 Difference]: With dead ends: 551 [2021-08-21 12:29:39,395 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 12:29:39,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:29:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 12:29:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 434. [2021-08-21 12:29:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.140877598152425) internal successors, (1360), 433 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1360 transitions. [2021-08-21 12:29:39,400 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1360 transitions. Word has length 21 [2021-08-21 12:29:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:39,400 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1360 transitions. [2021-08-21 12:29:39,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1360 transitions. [2021-08-21 12:29:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:39,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:39,401 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:39,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:39,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-08-21 12:29:39,603 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash 375252509, now seen corresponding path program 250 times [2021-08-21 12:29:39,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:39,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497660044] [2021-08-21 12:29:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:39,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:39,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:39,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497660044] [2021-08-21 12:29:39,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497660044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:39,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387142715] [2021-08-21 12:29:39,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:29:39,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:39,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:39,726 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:39,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-21 12:29:44,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:29:44,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:44,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:44,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:44,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-08-21 12:29:44,708 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 19 treesize of output 15 [2021-08-21 12:29:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:44,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387142715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:44,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:44,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:29:44,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133613395] [2021-08-21 12:29:44,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:29:44,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:29:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:29:44,745 INFO L87 Difference]: Start difference. First operand 434 states and 1360 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:44,955 INFO L93 Difference]: Finished difference Result 646 states and 1932 transitions. [2021-08-21 12:29:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:29:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:44,956 INFO L225 Difference]: With dead ends: 646 [2021-08-21 12:29:44,956 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 12:29:44,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:29:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 12:29:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 424. [2021-08-21 12:29:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.132387706855792) internal successors, (1325), 423 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1325 transitions. [2021-08-21 12:29:44,961 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1325 transitions. Word has length 21 [2021-08-21 12:29:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:44,961 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1325 transitions. [2021-08-21 12:29:44,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1325 transitions. [2021-08-21 12:29:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:44,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:44,962 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:44,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2021-08-21 12:29:45,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:45,177 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash -67685427, now seen corresponding path program 251 times [2021-08-21 12:29:45,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:45,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952022016] [2021-08-21 12:29:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:45,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:45,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:45,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952022016] [2021-08-21 12:29:45,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952022016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:45,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686327929] [2021-08-21 12:29:45,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:29:45,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:45,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:45,324 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:45,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2021-08-21 12:29:50,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:29:50,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:50,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:50,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:50,729 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 19 treesize of output 15 [2021-08-21 12:29:50,828 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 34 treesize of output 30 [2021-08-21 12:29:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:50,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686327929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:50,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:50,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:29:50,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949638870] [2021-08-21 12:29:50,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:29:50,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:29:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:29:50,878 INFO L87 Difference]: Start difference. First operand 424 states and 1325 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:51,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:51,203 INFO L93 Difference]: Finished difference Result 680 states and 2062 transitions. [2021-08-21 12:29:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:29:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:51,204 INFO L225 Difference]: With dead ends: 680 [2021-08-21 12:29:51,204 INFO L226 Difference]: Without dead ends: 647 [2021-08-21 12:29:51,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:29:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-08-21 12:29:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 427. [2021-08-21 12:29:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.124413145539906) internal successors, (1331), 426 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1331 transitions. [2021-08-21 12:29:51,210 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1331 transitions. Word has length 21 [2021-08-21 12:29:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:51,210 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1331 transitions. [2021-08-21 12:29:51,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1331 transitions. [2021-08-21 12:29:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:51,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:51,211 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:51,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:51,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:51,412 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1708616946, now seen corresponding path program 252 times [2021-08-21 12:29:51,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:51,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067471087] [2021-08-21 12:29:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:51,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:51,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:51,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067471087] [2021-08-21 12:29:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067471087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:51,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267704517] [2021-08-21 12:29:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:29:51,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:51,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:51,556 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:51,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2021-08-21 12:29:56,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:29:56,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:56,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:29:56,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:56,894 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 30 treesize of output 26 [2021-08-21 12:29:57,059 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:57,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 26 [2021-08-21 12:29:57,064 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:57,064 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 23 treesize of output 22 [2021-08-21 12:29:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:57,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267704517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:57,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:57,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:29:57,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387360674] [2021-08-21 12:29:57,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:29:57,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:29:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:29:57,112 INFO L87 Difference]: Start difference. First operand 427 states and 1331 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:57,307 INFO L93 Difference]: Finished difference Result 601 states and 1838 transitions. [2021-08-21 12:29:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:29:57,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:29:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:57,308 INFO L225 Difference]: With dead ends: 601 [2021-08-21 12:29:57,308 INFO L226 Difference]: Without dead ends: 578 [2021-08-21 12:29:57,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:29:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-21 12:29:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 425. [2021-08-21 12:29:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1273584905660377) internal successors, (1326), 424 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1326 transitions. [2021-08-21 12:29:57,313 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1326 transitions. Word has length 21 [2021-08-21 12:29:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1326 transitions. [2021-08-21 12:29:57,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:57,314 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1326 transitions. [2021-08-21 12:29:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:29:57,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:57,314 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:57,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:57,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:57,525 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1365467295, now seen corresponding path program 253 times [2021-08-21 12:29:57,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:57,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575951113] [2021-08-21 12:29:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:57,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:57,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:57,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575951113] [2021-08-21 12:29:57,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575951113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:57,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464256847] [2021-08-21 12:29:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:29:57,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:57,623 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:57,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2021-08-21 12:30:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:30:03,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:03,135 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 32 treesize of output 28 [2021-08-21 12:30:03,226 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 19 treesize of output 15 [2021-08-21 12:30:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:03,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464256847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:03,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:03,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:30:03,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050255779] [2021-08-21 12:30:03,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:30:03,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:30:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:03,244 INFO L87 Difference]: Start difference. First operand 425 states and 1326 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 12:30:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:03,395 INFO L93 Difference]: Finished difference Result 551 states and 1684 transitions. [2021-08-21 12:30:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:03,395 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 21 [2021-08-21 12:30:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:03,396 INFO L225 Difference]: With dead ends: 551 [2021-08-21 12:30:03,396 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 12:30:03,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 12:30:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 428. [2021-08-21 12:30:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.1334894613583137) internal successors, (1338), 427 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1338 transitions. [2021-08-21 12:30:03,401 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1338 transitions. Word has length 21 [2021-08-21 12:30:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:03,402 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1338 transitions. [2021-08-21 12:30:03,402 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 12:30:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1338 transitions. [2021-08-21 12:30:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:03,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:03,402 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:03,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:03,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:03,629 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:03,629 INFO L82 PathProgramCache]: Analyzing trace with hash -220341227, now seen corresponding path program 254 times [2021-08-21 12:30:03,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:03,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820147269] [2021-08-21 12:30:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:03,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:03,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:03,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820147269] [2021-08-21 12:30:03,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820147269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:03,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316438770] [2021-08-21 12:30:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:03,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:03,799 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:03,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2021-08-21 12:30:09,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:09,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:30:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:09,278 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 32 treesize of output 28 [2021-08-21 12:30:09,356 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 19 treesize of output 15 [2021-08-21 12:30:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:09,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316438770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:09,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:09,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 12:30:09,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080037378] [2021-08-21 12:30:09,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:30:09,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:30:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:30:09,398 INFO L87 Difference]: Start difference. First operand 428 states and 1338 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:09,532 INFO L93 Difference]: Finished difference Result 542 states and 1660 transitions. [2021-08-21 12:30:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:30:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:09,533 INFO L225 Difference]: With dead ends: 542 [2021-08-21 12:30:09,533 INFO L226 Difference]: Without dead ends: 520 [2021-08-21 12:30:09,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:30:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-21 12:30:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 425. [2021-08-21 12:30:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1273584905660377) internal successors, (1326), 424 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1326 transitions. [2021-08-21 12:30:09,538 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1326 transitions. Word has length 21 [2021-08-21 12:30:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:09,538 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1326 transitions. [2021-08-21 12:30:09,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1326 transitions. [2021-08-21 12:30:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:09,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:09,539 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:09,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2021-08-21 12:30:09,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-21 12:30:09,757 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash 888820749, now seen corresponding path program 255 times [2021-08-21 12:30:09,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:09,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032181561] [2021-08-21 12:30:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:09,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:09,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:09,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032181561] [2021-08-21 12:30:09,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032181561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:09,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386300500] [2021-08-21 12:30:09,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:09,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:09,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:09,895 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:09,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2021-08-21 12:30:15,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:30:15,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:30:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:15,297 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 19 treesize of output 15 [2021-08-21 12:30:15,377 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 34 treesize of output 30 [2021-08-21 12:30:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386300500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:15,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:15,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:30:15,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31545697] [2021-08-21 12:30:15,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:30:15,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:30:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:15,438 INFO L87 Difference]: Start difference. First operand 425 states and 1326 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 12:30:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:15,617 INFO L93 Difference]: Finished difference Result 561 states and 1705 transitions. [2021-08-21 12:30:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:15,617 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 21 [2021-08-21 12:30:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:15,618 INFO L225 Difference]: With dead ends: 561 [2021-08-21 12:30:15,618 INFO L226 Difference]: Without dead ends: 534 [2021-08-21 12:30:15,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:30:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-21 12:30:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 425. [2021-08-21 12:30:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1273584905660377) internal successors, (1326), 424 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1326 transitions. [2021-08-21 12:30:15,693 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1326 transitions. Word has length 21 [2021-08-21 12:30:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:15,693 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1326 transitions. [2021-08-21 12:30:15,693 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 12:30:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1326 transitions. [2021-08-21 12:30:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:15,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:15,694 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:15,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:15,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-08-21 12:30:15,894 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash 33264021, now seen corresponding path program 256 times [2021-08-21 12:30:15,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:15,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696133997] [2021-08-21 12:30:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:15,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:16,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:16,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696133997] [2021-08-21 12:30:16,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696133997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:16,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139868022] [2021-08-21 12:30:16,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:16,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:16,038 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Received shutdown request... [2021-08-21 12:30:16,039 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 12:30:16,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2021-08-21 12:30:16,066 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:30:17,083 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:30:17,088 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 12:30:17,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2021-08-21 12:30:17,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:17,284 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while executing Executor. [2021-08-21 12:30:17,286 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:30:17,286 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:30:17,286 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 12:30:17,289 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:30:17,289 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:30:17,290 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:30:17 BasicIcfg [2021-08-21 12:30:17,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:30:17,291 INFO L168 Benchmark]: Toolchain (without parser) took 905032.70 ms. Allocated memory was 179.3 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 159.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 12:30:17,291 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.32 ms. Allocated memory is still 179.3 MB. Free memory is still 160.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:30:17,291 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.53 ms. Allocated memory is still 179.3 MB. Free memory was 159.6 MB in the beginning and 158.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:30:17,291 INFO L168 Benchmark]: Boogie Preprocessor took 26.48 ms. Allocated memory is still 179.3 MB. Free memory was 158.1 MB in the beginning and 157.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:30:17,291 INFO L168 Benchmark]: RCFGBuilder took 428.10 ms. Allocated memory is still 179.3 MB. Free memory was 156.9 MB in the beginning and 133.1 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:30:17,291 INFO L168 Benchmark]: TraceAbstraction took 904547.97 ms. Allocated memory was 179.3 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 132.5 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 12:30:17,292 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 0.32 ms. Allocated memory is still 179.3 MB. Free memory is still 160.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.53 ms. Allocated memory is still 179.3 MB. Free memory was 159.6 MB in the beginning and 158.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.48 ms. Allocated memory is still 179.3 MB. Free memory was 158.1 MB in the beginning and 157.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 428.10 ms. Allocated memory is still 179.3 MB. Free memory was 156.9 MB in the beginning and 133.1 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 904547.97 ms. Allocated memory was 179.3 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 132.5 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). 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: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 97]: 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 22 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 101]: 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 22 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 100]: 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 22 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 904442.8ms, OverallIterations: 268, TraceHistogramMax: 2, EmptinessCheckTime: 196.6ms, AutomataDifference: 68433.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14487 SDtfs, 15026 SDslu, 71736 SDs, 0 SdLazy, 95879 SolverSat, 6039 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38775.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8698 GetRequests, 3481 SyntacticMatches, 600 SemanticMatches, 4617 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19900 ImplicationChecksByTransitivity, 54593.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=434occurred in iteration=261, InterpolantAutomatonStates: 2986, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1364.5ms AutomataMinimizationTime, 267 MinimizatonAttempts, 41134 StatesRemovedByMinimization, 263 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1214.5ms SsaConstructionTime, 4131.9ms SatisfiabilityAnalysisTime, 94503.1ms InterpolantComputationTime, 10543 NumberOfCodeBlocks, 10543 NumberOfCodeBlocksAsserted, 767 NumberOfCheckSat, 10021 ConstructedInterpolants, 409 QuantifiedInterpolants, 103035 SizeOfPredicates, 2936 NumberOfNonLiveVariables, 21082 ConjunctsInSsa, 5242 ConjunctsInUnsatCore, 522 InterpolantComputations, 12 PerfectInterpolantSequences, 131/1791 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