/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/name-comparator-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:31:56,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:31:56,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:31:56,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:31:56,723 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 14:31:56,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:31:56,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:31:56,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:31:56,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:31:56,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:31:56,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:31:56,762 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:31:56,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:31:56,762 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:31:56,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:31:56,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:31:56,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:31:56,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:31:56,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:31:56,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:31:56,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:31:56,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:31:56,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:31:56,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:31:56,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:31:56,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:31:56,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:31:56,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:31:56,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:31:56,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:31:56,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:31:56,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:31:56,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:31:56,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:31:56,765 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:31:56,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:31:56,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:31:57,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:31:57,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:31:57,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:31:57,065 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:31:57,067 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:31:57,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl [2021-08-06 14:31:57,068 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl' [2021-08-06 14:31:57,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:31:57,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:31:57,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:31:57,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:31:57,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:31:57,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:31:57,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:31:57,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:31:57,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:31:57,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:31:57,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:31:57,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:31:57,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:31:57,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/1) ... [2021-08-06 14:31:57,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:31:57,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:57,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 14:31:57,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 14:31:57,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:31:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:31:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:31:57,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:31:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:31:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:31:57,272 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:31:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:31:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:31:57,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:31:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:31:57,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:31:57,275 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:31:57,699 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:31:57,700 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-06 14:31:57,702 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:31:57 BoogieIcfgContainer [2021-08-06 14:31:57,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:31:57,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:31:57,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:31:57,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:31:57,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:31:57" (1/2) ... [2021-08-06 14:31:57,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac8161a and model type name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:31:57, skipping insertion in model container [2021-08-06 14:31:57,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:31:57" (2/2) ... [2021-08-06 14:31:57,708 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-subst.wvr.bpl [2021-08-06 14:31:57,712 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:31:57,712 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:31:57,712 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:31:57,712 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:31:57,776 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 14:31:57,815 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:31:57,820 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 14:31:57,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 14:31:57,835 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-08-06 14:31:57,870 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) [2021-08-06 14:31:57,872 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) [2021-08-06 14:31:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:57,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:57,880 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:57,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1091082122, now seen corresponding path program 1 times [2021-08-06 14:31:57,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:57,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739819269] [2021-08-06 14:31:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:57,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:58,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:58,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739819269] [2021-08-06 14:31:58,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739819269] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:31:58,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:31:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:31:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316326468] [2021-08-06 14:31:58,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:31:58,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:31:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:31:58,336 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 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:58,819 INFO L93 Difference]: Finished difference Result 399 states and 1111 transitions. [2021-08-06 14:31:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:31:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:31:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:58,842 INFO L225 Difference]: With dead ends: 399 [2021-08-06 14:31:58,843 INFO L226 Difference]: Without dead ends: 357 [2021-08-06 14:31:58,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:31:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-06 14:31:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 147. [2021-08-06 14:31:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.863013698630137) internal successors, (418), 146 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 418 transitions. [2021-08-06 14:31:58,897 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 418 transitions. Word has length 17 [2021-08-06 14:31:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:58,898 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 418 transitions. [2021-08-06 14:31:58,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 418 transitions. [2021-08-06 14:31:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:58,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:58,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:58,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:31:58,901 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:58,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:58,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1716858762, now seen corresponding path program 2 times [2021-08-06 14:31:58,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:58,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359530670] [2021-08-06 14:31:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:58,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:59,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:59,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359530670] [2021-08-06 14:31:59,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359530670] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:31:59,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:31:59,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:31:59,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500215256] [2021-08-06 14:31:59,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:31:59,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:31:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:31:59,218 INFO L87 Difference]: Start difference. First operand 147 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:31:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:59,520 INFO L93 Difference]: Finished difference Result 375 states and 1007 transitions. [2021-08-06 14:31:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:31:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:31:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:59,523 INFO L225 Difference]: With dead ends: 375 [2021-08-06 14:31:59,523 INFO L226 Difference]: Without dead ends: 353 [2021-08-06 14:31:59,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:31:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-06 14:31:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2021-08-06 14:31:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.864705882352941) internal successors, (487), 170 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 487 transitions. [2021-08-06 14:31:59,541 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 487 transitions. Word has length 17 [2021-08-06 14:31:59,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:59,541 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 487 transitions. [2021-08-06 14:31:59,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:31:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 487 transitions. [2021-08-06 14:31:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:59,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:59,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:59,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:31:59,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:59,544 INFO L82 PathProgramCache]: Analyzing trace with hash 431937774, now seen corresponding path program 3 times [2021-08-06 14:31:59,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:59,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42485639] [2021-08-06 14:31:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:59,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:59,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:59,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42485639] [2021-08-06 14:31:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42485639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:31:59,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:31:59,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:31:59,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485943378] [2021-08-06 14:31:59,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:31:59,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:59,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:31:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:31:59,746 INFO L87 Difference]: Start difference. First operand 171 states and 487 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:00,053 INFO L93 Difference]: Finished difference Result 390 states and 1060 transitions. [2021-08-06 14:32:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:00,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:00,058 INFO L225 Difference]: With dead ends: 390 [2021-08-06 14:32:00,059 INFO L226 Difference]: Without dead ends: 375 [2021-08-06 14:32:00,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-06 14:32:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 177. [2021-08-06 14:32:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.909090909090909) internal successors, (512), 176 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-08-06 14:32:00,082 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-08-06 14:32:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:00,082 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-08-06 14:32:00,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-08-06 14:32:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:00,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:00,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:00,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:32:00,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1885470014, now seen corresponding path program 4 times [2021-08-06 14:32:00,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:00,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922190267] [2021-08-06 14:32:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:00,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:00,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:00,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922190267] [2021-08-06 14:32:00,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922190267] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:00,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:00,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:00,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977281732] [2021-08-06 14:32:00,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:00,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:00,291 INFO L87 Difference]: Start difference. First operand 177 states and 512 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:00,523 INFO L93 Difference]: Finished difference Result 390 states and 1047 transitions. [2021-08-06 14:32:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:00,526 INFO L225 Difference]: With dead ends: 390 [2021-08-06 14:32:00,526 INFO L226 Difference]: Without dead ends: 369 [2021-08-06 14:32:00,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-06 14:32:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-08-06 14:32:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.8920454545454546) internal successors, (509), 176 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 509 transitions. [2021-08-06 14:32:00,537 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 509 transitions. Word has length 17 [2021-08-06 14:32:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:00,537 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 509 transitions. [2021-08-06 14:32:00,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 509 transitions. [2021-08-06 14:32:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:00,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:00,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:00,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:32:00,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2058717706, now seen corresponding path program 5 times [2021-08-06 14:32:00,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:00,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276171476] [2021-08-06 14:32:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:00,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:00,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276171476] [2021-08-06 14:32:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276171476] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:00,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:00,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:00,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454585925] [2021-08-06 14:32:00,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:00,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:00,677 INFO L87 Difference]: Start difference. First operand 177 states and 509 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:00,896 INFO L93 Difference]: Finished difference Result 360 states and 984 transitions. [2021-08-06 14:32:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:00,899 INFO L225 Difference]: With dead ends: 360 [2021-08-06 14:32:00,899 INFO L226 Difference]: Without dead ends: 333 [2021-08-06 14:32:00,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-08-06 14:32:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 177. [2021-08-06 14:32:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.875) internal successors, (506), 176 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 506 transitions. [2021-08-06 14:32:00,907 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 506 transitions. Word has length 17 [2021-08-06 14:32:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:00,908 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 506 transitions. [2021-08-06 14:32:00,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 506 transitions. [2021-08-06 14:32:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:00,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:00,909 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:00,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 14:32:00,909 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash -126988386, now seen corresponding path program 6 times [2021-08-06 14:32:00,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:00,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934266966] [2021-08-06 14:32:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:00,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:01,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:01,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934266966] [2021-08-06 14:32:01,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934266966] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:01,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:01,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:01,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430832186] [2021-08-06 14:32:01,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:01,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:01,121 INFO L87 Difference]: Start difference. First operand 177 states and 506 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:01,418 INFO L93 Difference]: Finished difference Result 473 states and 1280 transitions. [2021-08-06 14:32:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:01,421 INFO L225 Difference]: With dead ends: 473 [2021-08-06 14:32:01,421 INFO L226 Difference]: Without dead ends: 451 [2021-08-06 14:32:01,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-06 14:32:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 179. [2021-08-06 14:32:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.898876404494382) internal successors, (516), 178 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 516 transitions. [2021-08-06 14:32:01,430 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 516 transitions. Word has length 17 [2021-08-06 14:32:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:01,430 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 516 transitions. [2021-08-06 14:32:01,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 516 transitions. [2021-08-06 14:32:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:01,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:01,431 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:01,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:32:01,431 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:01,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2128553198, now seen corresponding path program 7 times [2021-08-06 14:32:01,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:01,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556693250] [2021-08-06 14:32:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:01,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:01,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:01,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556693250] [2021-08-06 14:32:01,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556693250] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:01,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:01,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:01,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75774776] [2021-08-06 14:32:01,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:01,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:01,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:01,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:01,636 INFO L87 Difference]: Start difference. First operand 179 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:01,947 INFO L93 Difference]: Finished difference Result 457 states and 1242 transitions. [2021-08-06 14:32:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:01,951 INFO L225 Difference]: With dead ends: 457 [2021-08-06 14:32:01,951 INFO L226 Difference]: Without dead ends: 435 [2021-08-06 14:32:01,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-06 14:32:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 182. [2021-08-06 14:32:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9337016574585637) internal successors, (531), 181 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 531 transitions. [2021-08-06 14:32:01,960 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 531 transitions. Word has length 17 [2021-08-06 14:32:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 531 transitions. [2021-08-06 14:32:01,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 531 transitions. [2021-08-06 14:32:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:01,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:01,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:01,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 14:32:01,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1387308582, now seen corresponding path program 8 times [2021-08-06 14:32:01,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:01,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120046719] [2021-08-06 14:32:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:01,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:02,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:02,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120046719] [2021-08-06 14:32:02,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120046719] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:02,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:02,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:02,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359099829] [2021-08-06 14:32:02,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:02,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:02,152 INFO L87 Difference]: Start difference. First operand 182 states and 531 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:02,464 INFO L93 Difference]: Finished difference Result 423 states and 1167 transitions. [2021-08-06 14:32:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:02,467 INFO L225 Difference]: With dead ends: 423 [2021-08-06 14:32:02,467 INFO L226 Difference]: Without dead ends: 401 [2021-08-06 14:32:02,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-06 14:32:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 188. [2021-08-06 14:32:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9197860962566846) internal successors, (546), 187 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 546 transitions. [2021-08-06 14:32:02,475 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 546 transitions. Word has length 17 [2021-08-06 14:32:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:02,475 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 546 transitions. [2021-08-06 14:32:02,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 546 transitions. [2021-08-06 14:32:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:02,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:02,476 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:02,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 14:32:02,477 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:02,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1634250142, now seen corresponding path program 9 times [2021-08-06 14:32:02,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:02,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799447074] [2021-08-06 14:32:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:02,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:02,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:02,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799447074] [2021-08-06 14:32:02,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799447074] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:02,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:02,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:02,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446695563] [2021-08-06 14:32:02,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:02,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:02,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:02,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:02,659 INFO L87 Difference]: Start difference. First operand 188 states and 546 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:02,917 INFO L93 Difference]: Finished difference Result 479 states and 1324 transitions. [2021-08-06 14:32:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:02,921 INFO L225 Difference]: With dead ends: 479 [2021-08-06 14:32:02,921 INFO L226 Difference]: Without dead ends: 464 [2021-08-06 14:32:02,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-06 14:32:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 195. [2021-08-06 14:32:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-08-06 14:32:02,930 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 17 [2021-08-06 14:32:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:02,930 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-08-06 14:32:02,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-08-06 14:32:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:02,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:02,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:02,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 14:32:02,931 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1207184914, now seen corresponding path program 10 times [2021-08-06 14:32:02,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:02,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307669481] [2021-08-06 14:32:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:02,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:03,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:03,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307669481] [2021-08-06 14:32:03,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307669481] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:03,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:03,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:03,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524959764] [2021-08-06 14:32:03,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:03,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:03,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:03,090 INFO L87 Difference]: Start difference. First operand 195 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:03,385 INFO L93 Difference]: Finished difference Result 479 states and 1311 transitions. [2021-08-06 14:32:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:03,388 INFO L225 Difference]: With dead ends: 479 [2021-08-06 14:32:03,388 INFO L226 Difference]: Without dead ends: 458 [2021-08-06 14:32:03,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-06 14:32:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 192. [2021-08-06 14:32:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9424083769633507) internal successors, (562), 191 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-08-06 14:32:03,396 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 17 [2021-08-06 14:32:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:03,396 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-08-06 14:32:03,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-08-06 14:32:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:03,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:03,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:03,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 14:32:03,397 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:03,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1033937222, now seen corresponding path program 11 times [2021-08-06 14:32:03,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:03,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281449274] [2021-08-06 14:32:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:03,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:03,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:03,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281449274] [2021-08-06 14:32:03,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281449274] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:03,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:03,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:03,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166178291] [2021-08-06 14:32:03,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:03,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:03,544 INFO L87 Difference]: Start difference. First operand 192 states and 562 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:03,762 INFO L93 Difference]: Finished difference Result 484 states and 1319 transitions. [2021-08-06 14:32:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:03,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:03,765 INFO L225 Difference]: With dead ends: 484 [2021-08-06 14:32:03,765 INFO L226 Difference]: Without dead ends: 457 [2021-08-06 14:32:03,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-06 14:32:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 189. [2021-08-06 14:32:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-08-06 14:32:03,775 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-08-06 14:32:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:03,776 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-08-06 14:32:03,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-08-06 14:32:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:03,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:03,777 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:03,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 14:32:03,777 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash 438610294, now seen corresponding path program 12 times [2021-08-06 14:32:03,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:03,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214507000] [2021-08-06 14:32:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:03,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:03,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:03,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214507000] [2021-08-06 14:32:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214507000] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:03,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:03,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:03,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809453769] [2021-08-06 14:32:03,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:03,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:03,985 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:04,248 INFO L93 Difference]: Finished difference Result 466 states and 1294 transitions. [2021-08-06 14:32:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:04,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:04,251 INFO L225 Difference]: With dead ends: 466 [2021-08-06 14:32:04,251 INFO L226 Difference]: Without dead ends: 444 [2021-08-06 14:32:04,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-06 14:32:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 195. [2021-08-06 14:32:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.979381443298969) internal successors, (578), 194 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-08-06 14:32:04,259 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-08-06 14:32:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:04,259 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-08-06 14:32:04,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-08-06 14:32:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:04,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:04,260 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:04,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 14:32:04,260 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1217715810, now seen corresponding path program 13 times [2021-08-06 14:32:04,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:04,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005160919] [2021-08-06 14:32:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:04,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:04,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:04,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005160919] [2021-08-06 14:32:04,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005160919] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:04,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:04,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:04,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884124881] [2021-08-06 14:32:04,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:04,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:04,426 INFO L87 Difference]: Start difference. First operand 195 states and 578 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:04,734 INFO L93 Difference]: Finished difference Result 442 states and 1237 transitions. [2021-08-06 14:32:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:04,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:04,737 INFO L225 Difference]: With dead ends: 442 [2021-08-06 14:32:04,737 INFO L226 Difference]: Without dead ends: 420 [2021-08-06 14:32:04,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-06 14:32:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 192. [2021-08-06 14:32:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9476439790575917) internal successors, (563), 191 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 563 transitions. [2021-08-06 14:32:04,745 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 563 transitions. Word has length 17 [2021-08-06 14:32:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:04,746 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 563 transitions. [2021-08-06 14:32:04,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 563 transitions. [2021-08-06 14:32:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:04,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:04,748 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:04,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 14:32:04,748 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:04,748 INFO L82 PathProgramCache]: Analyzing trace with hash 799711430, now seen corresponding path program 14 times [2021-08-06 14:32:04,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:04,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338591807] [2021-08-06 14:32:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:04,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:04,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:04,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338591807] [2021-08-06 14:32:04,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338591807] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:04,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:04,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:04,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704968198] [2021-08-06 14:32:04,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:04,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:04,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:04,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:04,913 INFO L87 Difference]: Start difference. First operand 192 states and 563 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:05,122 INFO L93 Difference]: Finished difference Result 426 states and 1176 transitions. [2021-08-06 14:32:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:05,125 INFO L225 Difference]: With dead ends: 426 [2021-08-06 14:32:05,125 INFO L226 Difference]: Without dead ends: 399 [2021-08-06 14:32:05,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-06 14:32:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 194. [2021-08-06 14:32:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.94300518134715) internal successors, (568), 193 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 568 transitions. [2021-08-06 14:32:05,132 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 568 transitions. Word has length 17 [2021-08-06 14:32:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:05,133 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 568 transitions. [2021-08-06 14:32:05,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 568 transitions. [2021-08-06 14:32:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:05,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:05,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:05,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 14:32:05,134 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:05,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:05,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1112471848, now seen corresponding path program 15 times [2021-08-06 14:32:05,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:05,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611420891] [2021-08-06 14:32:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:05,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:05,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:05,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611420891] [2021-08-06 14:32:05,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611420891] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:05,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:05,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:05,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850338514] [2021-08-06 14:32:05,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:05,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:05,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:05,329 INFO L87 Difference]: Start difference. First operand 194 states and 568 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:05,648 INFO L93 Difference]: Finished difference Result 390 states and 1077 transitions. [2021-08-06 14:32:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:05,650 INFO L225 Difference]: With dead ends: 390 [2021-08-06 14:32:05,650 INFO L226 Difference]: Without dead ends: 368 [2021-08-06 14:32:05,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-06 14:32:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 196. [2021-08-06 14:32:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.9641025641025642) internal successors, (578), 195 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 578 transitions. [2021-08-06 14:32:05,659 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 578 transitions. Word has length 17 [2021-08-06 14:32:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:05,659 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 578 transitions. [2021-08-06 14:32:05,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 578 transitions. [2021-08-06 14:32:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:05,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:05,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:05,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 14:32:05,662 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1143069736, now seen corresponding path program 16 times [2021-08-06 14:32:05,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:05,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968837298] [2021-08-06 14:32:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:05,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:05,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:05,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968837298] [2021-08-06 14:32:05,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968837298] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:05,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:05,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:05,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035859760] [2021-08-06 14:32:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:05,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:05,896 INFO L87 Difference]: Start difference. First operand 196 states and 578 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:06,261 INFO L93 Difference]: Finished difference Result 441 states and 1207 transitions. [2021-08-06 14:32:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:06,270 INFO L225 Difference]: With dead ends: 441 [2021-08-06 14:32:06,270 INFO L226 Difference]: Without dead ends: 419 [2021-08-06 14:32:06,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-06 14:32:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 199. [2021-08-06 14:32:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.994949494949495) internal successors, (593), 198 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 593 transitions. [2021-08-06 14:32:06,278 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 593 transitions. Word has length 17 [2021-08-06 14:32:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 593 transitions. [2021-08-06 14:32:06,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 593 transitions. [2021-08-06 14:32:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:06,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:06,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:06,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-06 14:32:06,279 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:06,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1922175252, now seen corresponding path program 17 times [2021-08-06 14:32:06,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:06,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116064927] [2021-08-06 14:32:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:06,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:06,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:06,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116064927] [2021-08-06 14:32:06,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116064927] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:06,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:06,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:06,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723328585] [2021-08-06 14:32:06,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:06,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:06,481 INFO L87 Difference]: Start difference. First operand 199 states and 593 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:06,767 INFO L93 Difference]: Finished difference Result 407 states and 1132 transitions. [2021-08-06 14:32:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:06,769 INFO L225 Difference]: With dead ends: 407 [2021-08-06 14:32:06,769 INFO L226 Difference]: Without dead ends: 385 [2021-08-06 14:32:06,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-08-06 14:32:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 194. [2021-08-06 14:32:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.94300518134715) internal successors, (568), 193 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 568 transitions. [2021-08-06 14:32:06,776 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 568 transitions. Word has length 17 [2021-08-06 14:32:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:06,776 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 568 transitions. [2021-08-06 14:32:06,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 568 transitions. [2021-08-06 14:32:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:06,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:06,777 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:06,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-06 14:32:06,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2058151224, now seen corresponding path program 18 times [2021-08-06 14:32:06,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:06,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578504843] [2021-08-06 14:32:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:06,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:06,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:06,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578504843] [2021-08-06 14:32:06,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578504843] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:06,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:06,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:06,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744466282] [2021-08-06 14:32:06,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:06,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:06,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:06,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:06,943 INFO L87 Difference]: Start difference. First operand 194 states and 568 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:07,212 INFO L93 Difference]: Finished difference Result 404 states and 1136 transitions. [2021-08-06 14:32:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:07,214 INFO L225 Difference]: With dead ends: 404 [2021-08-06 14:32:07,214 INFO L226 Difference]: Without dead ends: 389 [2021-08-06 14:32:07,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-06 14:32:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 203. [2021-08-06 14:32:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.014851485148515) internal successors, (609), 202 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 609 transitions. [2021-08-06 14:32:07,222 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 609 transitions. Word has length 17 [2021-08-06 14:32:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:07,222 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 609 transitions. [2021-08-06 14:32:07,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 609 transitions. [2021-08-06 14:32:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:07,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:07,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:07,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-06 14:32:07,223 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:07,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1457710556, now seen corresponding path program 19 times [2021-08-06 14:32:07,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:07,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296787142] [2021-08-06 14:32:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:07,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:07,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:07,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296787142] [2021-08-06 14:32:07,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296787142] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:07,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:07,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:07,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783150292] [2021-08-06 14:32:07,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:07,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:07,392 INFO L87 Difference]: Start difference. First operand 203 states and 609 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:07,673 INFO L93 Difference]: Finished difference Result 417 states and 1166 transitions. [2021-08-06 14:32:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:07,674 INFO L225 Difference]: With dead ends: 417 [2021-08-06 14:32:07,674 INFO L226 Difference]: Without dead ends: 402 [2021-08-06 14:32:07,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-06 14:32:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 203. [2021-08-06 14:32:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.014851485148515) internal successors, (609), 202 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 609 transitions. [2021-08-06 14:32:07,681 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 609 transitions. Word has length 17 [2021-08-06 14:32:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:07,681 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 609 transitions. [2021-08-06 14:32:07,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 609 transitions. [2021-08-06 14:32:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:07,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:07,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:07,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-06 14:32:07,682 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:07,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1508559320, now seen corresponding path program 20 times [2021-08-06 14:32:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:07,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042377847] [2021-08-06 14:32:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:07,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:07,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:07,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042377847] [2021-08-06 14:32:07,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042377847] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:07,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:07,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:07,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515466403] [2021-08-06 14:32:07,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:07,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:07,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:07,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:07,819 INFO L87 Difference]: Start difference. First operand 203 states and 609 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:08,063 INFO L93 Difference]: Finished difference Result 372 states and 1062 transitions. [2021-08-06 14:32:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:08,065 INFO L225 Difference]: With dead ends: 372 [2021-08-06 14:32:08,065 INFO L226 Difference]: Without dead ends: 357 [2021-08-06 14:32:08,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-06 14:32:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 209. [2021-08-06 14:32:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 3.0) internal successors, (624), 208 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 624 transitions. [2021-08-06 14:32:08,071 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 624 transitions. Word has length 17 [2021-08-06 14:32:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:08,071 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 624 transitions. [2021-08-06 14:32:08,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 624 transitions. [2021-08-06 14:32:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:08,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:08,072 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:08,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-06 14:32:08,072 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash -199855792, now seen corresponding path program 21 times [2021-08-06 14:32:08,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:08,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794299071] [2021-08-06 14:32:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:08,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:08,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:08,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794299071] [2021-08-06 14:32:08,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794299071] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:08,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:08,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:08,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692629654] [2021-08-06 14:32:08,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:08,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:08,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:08,221 INFO L87 Difference]: Start difference. First operand 209 states and 624 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:08,421 INFO L93 Difference]: Finished difference Result 422 states and 1196 transitions. [2021-08-06 14:32:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:08,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:08,422 INFO L225 Difference]: With dead ends: 422 [2021-08-06 14:32:08,423 INFO L226 Difference]: Without dead ends: 407 [2021-08-06 14:32:08,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-06 14:32:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 217. [2021-08-06 14:32:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.0462962962962963) internal successors, (658), 216 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) [2021-08-06 14:32:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 658 transitions. [2021-08-06 14:32:08,429 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 658 transitions. Word has length 17 [2021-08-06 14:32:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:08,429 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 658 transitions. [2021-08-06 14:32:08,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 658 transitions. [2021-08-06 14:32:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:08,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:08,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:08,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-06 14:32:08,430 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:08,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1253676448, now seen corresponding path program 22 times [2021-08-06 14:32:08,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:08,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311349604] [2021-08-06 14:32:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:08,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:08,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:08,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311349604] [2021-08-06 14:32:08,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311349604] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:08,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:08,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:08,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770902212] [2021-08-06 14:32:08,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:08,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:08,567 INFO L87 Difference]: Start difference. First operand 217 states and 658 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:08,791 INFO L93 Difference]: Finished difference Result 422 states and 1183 transitions. [2021-08-06 14:32:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:08,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:08,794 INFO L225 Difference]: With dead ends: 422 [2021-08-06 14:32:08,794 INFO L226 Difference]: Without dead ends: 401 [2021-08-06 14:32:08,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-06 14:32:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 214. [2021-08-06 14:32:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.023474178403756) internal successors, (644), 213 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 644 transitions. [2021-08-06 14:32:08,800 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 644 transitions. Word has length 17 [2021-08-06 14:32:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:08,801 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 644 transitions. [2021-08-06 14:32:08,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 644 transitions. [2021-08-06 14:32:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:08,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:08,801 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:08,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-06 14:32:08,802 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:08,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1426924140, now seen corresponding path program 23 times [2021-08-06 14:32:08,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:08,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176316995] [2021-08-06 14:32:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:08,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:08,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:08,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176316995] [2021-08-06 14:32:08,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176316995] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:08,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:08,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:08,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066953552] [2021-08-06 14:32:08,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:08,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:08,954 INFO L87 Difference]: Start difference. First operand 214 states and 644 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:09,155 INFO L93 Difference]: Finished difference Result 427 states and 1191 transitions. [2021-08-06 14:32:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:09,158 INFO L225 Difference]: With dead ends: 427 [2021-08-06 14:32:09,158 INFO L226 Difference]: Without dead ends: 400 [2021-08-06 14:32:09,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-06 14:32:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 211. [2021-08-06 14:32:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.0142857142857142) internal successors, (633), 210 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 633 transitions. [2021-08-06 14:32:09,164 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 633 transitions. Word has length 17 [2021-08-06 14:32:09,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:09,164 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 633 transitions. [2021-08-06 14:32:09,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 633 transitions. [2021-08-06 14:32:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:09,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:09,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:09,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-06 14:32:09,165 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:09,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1395495640, now seen corresponding path program 24 times [2021-08-06 14:32:09,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:09,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097693809] [2021-08-06 14:32:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:09,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:09,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:09,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097693809] [2021-08-06 14:32:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097693809] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:09,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:09,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:09,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101269326] [2021-08-06 14:32:09,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:09,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:09,325 INFO L87 Difference]: Start difference. First operand 211 states and 633 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:09,553 INFO L93 Difference]: Finished difference Result 468 states and 1314 transitions. [2021-08-06 14:32:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:09,555 INFO L225 Difference]: With dead ends: 468 [2021-08-06 14:32:09,555 INFO L226 Difference]: Without dead ends: 453 [2021-08-06 14:32:09,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-06 14:32:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 218. [2021-08-06 14:32:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0414746543778803) internal successors, (660), 217 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 660 transitions. [2021-08-06 14:32:09,562 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 660 transitions. Word has length 17 [2021-08-06 14:32:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:09,562 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 660 transitions. [2021-08-06 14:32:09,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 660 transitions. [2021-08-06 14:32:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:09,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:09,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:09,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-06 14:32:09,564 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash -616390124, now seen corresponding path program 25 times [2021-08-06 14:32:09,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:09,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379566323] [2021-08-06 14:32:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:09,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:09,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:09,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379566323] [2021-08-06 14:32:09,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379566323] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:09,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:09,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:09,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193286886] [2021-08-06 14:32:09,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:09,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:09,720 INFO L87 Difference]: Start difference. First operand 218 states and 660 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:09,937 INFO L93 Difference]: Finished difference Result 444 states and 1260 transitions. [2021-08-06 14:32:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:09,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:09,940 INFO L225 Difference]: With dead ends: 444 [2021-08-06 14:32:09,940 INFO L226 Difference]: Without dead ends: 429 [2021-08-06 14:32:09,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-06 14:32:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 213. [2021-08-06 14:32:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.009433962264151) internal successors, (638), 212 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) [2021-08-06 14:32:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-06 14:32:09,946 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-06 14:32:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:09,946 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-06 14:32:09,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-06 14:32:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:09,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:09,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:09,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-06 14:32:09,947 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1034394504, now seen corresponding path program 26 times [2021-08-06 14:32:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:09,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286516656] [2021-08-06 14:32:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:09,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:10,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:10,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286516656] [2021-08-06 14:32:10,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286516656] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:10,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:10,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:10,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195211815] [2021-08-06 14:32:10,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:10,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:10,075 INFO L87 Difference]: Start difference. First operand 213 states and 638 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:10,313 INFO L93 Difference]: Finished difference Result 470 states and 1291 transitions. [2021-08-06 14:32:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:10,315 INFO L225 Difference]: With dead ends: 470 [2021-08-06 14:32:10,316 INFO L226 Difference]: Without dead ends: 443 [2021-08-06 14:32:10,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-06 14:32:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 213. [2021-08-06 14:32:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.009433962264151) internal successors, (638), 212 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) [2021-08-06 14:32:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-06 14:32:10,322 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-06 14:32:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:10,322 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-06 14:32:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-06 14:32:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:10,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:10,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:10,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-06 14:32:10,323 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1209528752, now seen corresponding path program 27 times [2021-08-06 14:32:10,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:10,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583346838] [2021-08-06 14:32:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:10,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:10,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:10,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583346838] [2021-08-06 14:32:10,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583346838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:10,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:10,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:10,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688972375] [2021-08-06 14:32:10,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:10,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:10,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:10,469 INFO L87 Difference]: Start difference. First operand 213 states and 638 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:10,708 INFO L93 Difference]: Finished difference Result 445 states and 1295 transitions. [2021-08-06 14:32:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:10,711 INFO L225 Difference]: With dead ends: 445 [2021-08-06 14:32:10,711 INFO L226 Difference]: Without dead ends: 430 [2021-08-06 14:32:10,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-06 14:32:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 219. [2021-08-06 14:32:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.05045871559633) internal successors, (665), 218 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 665 transitions. [2021-08-06 14:32:10,717 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 665 transitions. Word has length 17 [2021-08-06 14:32:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:10,718 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 665 transitions. [2021-08-06 14:32:10,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 665 transitions. [2021-08-06 14:32:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:10,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:10,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:10,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-06 14:32:10,719 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1988634268, now seen corresponding path program 28 times [2021-08-06 14:32:10,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:10,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088649540] [2021-08-06 14:32:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:10,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:10,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:10,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088649540] [2021-08-06 14:32:10,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088649540] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:10,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939379566] [2021-08-06 14:32:10,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:10,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:10,875 INFO L87 Difference]: Start difference. First operand 219 states and 665 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:11,148 INFO L93 Difference]: Finished difference Result 458 states and 1325 transitions. [2021-08-06 14:32:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:11,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:11,151 INFO L225 Difference]: With dead ends: 458 [2021-08-06 14:32:11,151 INFO L226 Difference]: Without dead ends: 443 [2021-08-06 14:32:11,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-06 14:32:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 216. [2021-08-06 14:32:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0232558139534884) internal successors, (650), 215 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-08-06 14:32:11,157 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 17 [2021-08-06 14:32:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:11,157 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-08-06 14:32:11,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-08-06 14:32:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:11,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:11,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:11,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-06 14:32:11,158 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash 659936848, now seen corresponding path program 29 times [2021-08-06 14:32:11,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:11,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486535917] [2021-08-06 14:32:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:11,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:11,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:11,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486535917] [2021-08-06 14:32:11,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486535917] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:11,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:11,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:11,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885245510] [2021-08-06 14:32:11,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:11,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:11,297 INFO L87 Difference]: Start difference. First operand 216 states and 650 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:11,510 INFO L93 Difference]: Finished difference Result 409 states and 1199 transitions. [2021-08-06 14:32:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:11,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:11,512 INFO L225 Difference]: With dead ends: 409 [2021-08-06 14:32:11,512 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 14:32:11,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 14:32:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 213. [2021-08-06 14:32:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.009433962264151) internal successors, (638), 212 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) [2021-08-06 14:32:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-06 14:32:11,518 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-06 14:32:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:11,518 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-06 14:32:11,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-06 14:32:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:11,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:11,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:11,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-06 14:32:11,519 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -964284468, now seen corresponding path program 30 times [2021-08-06 14:32:11,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:11,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784072438] [2021-08-06 14:32:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:11,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:11,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:11,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784072438] [2021-08-06 14:32:11,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784072438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:11,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:11,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:11,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246610649] [2021-08-06 14:32:11,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:11,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:11,619 INFO L87 Difference]: Start difference. First operand 213 states and 638 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:11,772 INFO L93 Difference]: Finished difference Result 364 states and 1025 transitions. [2021-08-06 14:32:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-06 14:32:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:11,774 INFO L225 Difference]: With dead ends: 364 [2021-08-06 14:32:11,774 INFO L226 Difference]: Without dead ends: 337 [2021-08-06 14:32:11,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-06 14:32:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-08-06 14:32:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.009433962264151) internal successors, (638), 212 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) [2021-08-06 14:32:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-06 14:32:11,779 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-06 14:32:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:11,780 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-06 14:32:11,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-06 14:32:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-06 14:32:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:11,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:11,781 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:11,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-06 14:32:11,781 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1151884991, now seen corresponding path program 1 times [2021-08-06 14:32:11,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:11,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164686010] [2021-08-06 14:32:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:11,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:11,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:11,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164686010] [2021-08-06 14:32:11,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164686010] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:11,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:11,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:11,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233394155] [2021-08-06 14:32:11,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:11,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:11,879 INFO L87 Difference]: Start difference. First operand 213 states and 638 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:12,002 INFO L93 Difference]: Finished difference Result 447 states and 1250 transitions. [2021-08-06 14:32:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:12,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:12,004 INFO L225 Difference]: With dead ends: 447 [2021-08-06 14:32:12,004 INFO L226 Difference]: Without dead ends: 447 [2021-08-06 14:32:12,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-06 14:32:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 223. [2021-08-06 14:32:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.036036036036036) internal successors, (674), 222 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 674 transitions. [2021-08-06 14:32:12,009 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 674 transitions. Word has length 18 [2021-08-06 14:32:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:12,009 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 674 transitions. [2021-08-06 14:32:12,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 674 transitions. [2021-08-06 14:32:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:12,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:12,010 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:12,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-06 14:32:12,010 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash -565974871, now seen corresponding path program 1 times [2021-08-06 14:32:12,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:12,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326943100] [2021-08-06 14:32:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:12,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:12,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:12,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326943100] [2021-08-06 14:32:12,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326943100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:12,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:12,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:12,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681126910] [2021-08-06 14:32:12,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:12,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:12,093 INFO L87 Difference]: Start difference. First operand 223 states and 674 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:12,237 INFO L93 Difference]: Finished difference Result 393 states and 1113 transitions. [2021-08-06 14:32:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:12,238 INFO L225 Difference]: With dead ends: 393 [2021-08-06 14:32:12,239 INFO L226 Difference]: Without dead ends: 375 [2021-08-06 14:32:12,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-06 14:32:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 223. [2021-08-06 14:32:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.0135135135135136) internal successors, (669), 222 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 669 transitions. [2021-08-06 14:32:12,246 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 669 transitions. Word has length 18 [2021-08-06 14:32:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:12,246 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 669 transitions. [2021-08-06 14:32:12,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 669 transitions. [2021-08-06 14:32:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:12,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:12,247 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:12,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-06 14:32:12,247 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 872996999, now seen corresponding path program 2 times [2021-08-06 14:32:12,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:12,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567002157] [2021-08-06 14:32:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:12,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:12,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:12,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567002157] [2021-08-06 14:32:12,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567002157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:12,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:12,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:12,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421304208] [2021-08-06 14:32:12,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:12,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:12,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:12,309 INFO L87 Difference]: Start difference. First operand 223 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:12,459 INFO L93 Difference]: Finished difference Result 445 states and 1236 transitions. [2021-08-06 14:32:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:12,461 INFO L225 Difference]: With dead ends: 445 [2021-08-06 14:32:12,461 INFO L226 Difference]: Without dead ends: 445 [2021-08-06 14:32:12,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-08-06 14:32:12,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 226. [2021-08-06 14:32:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.022222222222222) internal successors, (680), 225 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 680 transitions. [2021-08-06 14:32:12,467 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 680 transitions. Word has length 18 [2021-08-06 14:32:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:12,467 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 680 transitions. [2021-08-06 14:32:12,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 680 transitions. [2021-08-06 14:32:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:12,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:12,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:12,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-06 14:32:12,469 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1755074433, now seen corresponding path program 3 times [2021-08-06 14:32:12,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:12,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784047822] [2021-08-06 14:32:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:12,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:12,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:12,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784047822] [2021-08-06 14:32:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784047822] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:12,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:12,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:12,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716778233] [2021-08-06 14:32:12,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:12,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:12,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:12,528 INFO L87 Difference]: Start difference. First operand 226 states and 680 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:12,653 INFO L93 Difference]: Finished difference Result 402 states and 1133 transitions. [2021-08-06 14:32:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:12,654 INFO L225 Difference]: With dead ends: 402 [2021-08-06 14:32:12,654 INFO L226 Difference]: Without dead ends: 396 [2021-08-06 14:32:12,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:12,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-06 14:32:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 226. [2021-08-06 14:32:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.008888888888889) internal successors, (677), 225 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 677 transitions. [2021-08-06 14:32:12,660 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 677 transitions. Word has length 18 [2021-08-06 14:32:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:12,660 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 677 transitions. [2021-08-06 14:32:12,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 677 transitions. [2021-08-06 14:32:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:12,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:12,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:12,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-06 14:32:12,661 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 475386821, now seen corresponding path program 2 times [2021-08-06 14:32:12,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:12,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161562459] [2021-08-06 14:32:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:12,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:12,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:12,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161562459] [2021-08-06 14:32:12,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161562459] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:12,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:12,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:12,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732219838] [2021-08-06 14:32:12,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:12,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:12,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:12,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:12,728 INFO L87 Difference]: Start difference. First operand 226 states and 677 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:12,838 INFO L93 Difference]: Finished difference Result 433 states and 1210 transitions. [2021-08-06 14:32:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:12,840 INFO L225 Difference]: With dead ends: 433 [2021-08-06 14:32:12,840 INFO L226 Difference]: Without dead ends: 426 [2021-08-06 14:32:12,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-06 14:32:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 245. [2021-08-06 14:32:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.0040983606557377) internal successors, (733), 244 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 733 transitions. [2021-08-06 14:32:12,845 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 733 transitions. Word has length 18 [2021-08-06 14:32:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:12,845 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 733 transitions. [2021-08-06 14:32:12,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 733 transitions. [2021-08-06 14:32:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:12,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:12,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:12,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-06 14:32:12,846 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:12,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:12,846 INFO L82 PathProgramCache]: Analyzing trace with hash 126329619, now seen corresponding path program 3 times [2021-08-06 14:32:12,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:12,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419217464] [2021-08-06 14:32:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:12,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:12,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:12,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419217464] [2021-08-06 14:32:12,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419217464] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:12,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:12,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:12,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891765052] [2021-08-06 14:32:12,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:12,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:12,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:12,919 INFO L87 Difference]: Start difference. First operand 245 states and 733 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:13,044 INFO L93 Difference]: Finished difference Result 435 states and 1223 transitions. [2021-08-06 14:32:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:13,046 INFO L225 Difference]: With dead ends: 435 [2021-08-06 14:32:13,046 INFO L226 Difference]: Without dead ends: 435 [2021-08-06 14:32:13,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-06 14:32:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 242. [2021-08-06 14:32:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.008298755186722) internal successors, (725), 241 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 725 transitions. [2021-08-06 14:32:13,055 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 725 transitions. Word has length 18 [2021-08-06 14:32:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:13,055 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 725 transitions. [2021-08-06 14:32:13,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,055 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 725 transitions. [2021-08-06 14:32:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:13,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:13,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:13,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-06 14:32:13,056 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash -408900183, now seen corresponding path program 4 times [2021-08-06 14:32:13,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:13,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892487162] [2021-08-06 14:32:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:13,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:13,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:13,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892487162] [2021-08-06 14:32:13,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892487162] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:13,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:13,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:13,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215767413] [2021-08-06 14:32:13,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:13,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:13,117 INFO L87 Difference]: Start difference. First operand 242 states and 725 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:13,228 INFO L93 Difference]: Finished difference Result 450 states and 1270 transitions. [2021-08-06 14:32:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:13,230 INFO L225 Difference]: With dead ends: 450 [2021-08-06 14:32:13,230 INFO L226 Difference]: Without dead ends: 450 [2021-08-06 14:32:13,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-06 14:32:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 238. [2021-08-06 14:32:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.9915611814345993) internal successors, (709), 237 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 709 transitions. [2021-08-06 14:32:13,237 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 709 transitions. Word has length 18 [2021-08-06 14:32:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:13,237 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 709 transitions. [2021-08-06 14:32:13,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 709 transitions. [2021-08-06 14:32:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:13,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:13,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:13,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-06 14:32:13,239 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:13,239 INFO L82 PathProgramCache]: Analyzing trace with hash -710853720, now seen corresponding path program 1 times [2021-08-06 14:32:13,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:13,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650709404] [2021-08-06 14:32:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:13,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:13,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:13,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650709404] [2021-08-06 14:32:13,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650709404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:13,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43263362] [2021-08-06 14:32:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:13,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:13,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:13,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:32:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:13,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43263362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:13,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:13,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-08-06 14:32:13,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6857212] [2021-08-06 14:32:13,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:13,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:13,775 INFO L87 Difference]: Start difference. First operand 238 states and 709 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:13,900 INFO L93 Difference]: Finished difference Result 453 states and 1298 transitions. [2021-08-06 14:32:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:13,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:13,902 INFO L225 Difference]: With dead ends: 453 [2021-08-06 14:32:13,902 INFO L226 Difference]: Without dead ends: 453 [2021-08-06 14:32:13,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:32:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-06 14:32:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 249. [2021-08-06 14:32:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.0524193548387095) internal successors, (757), 248 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 757 transitions. [2021-08-06 14:32:13,909 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 757 transitions. Word has length 18 [2021-08-06 14:32:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:13,909 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 757 transitions. [2021-08-06 14:32:13,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 757 transitions. [2021-08-06 14:32:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:13,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:13,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:13,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:14,131 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,SelfDestructingSolverStorable37 [2021-08-06 14:32:14,132 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash 742678520, now seen corresponding path program 2 times [2021-08-06 14:32:14,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:14,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313720439] [2021-08-06 14:32:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:14,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:14,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313720439] [2021-08-06 14:32:14,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313720439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924350474] [2021-08-06 14:32:14,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:14,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:14,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:14,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:32:14,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-06 14:32:14,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:32:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:32:14,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924350474] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:14,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:14,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-08-06 14:32:14,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048689050] [2021-08-06 14:32:14,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:32:14,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:14,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:32:14,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:14,743 INFO L87 Difference]: Start difference. First operand 249 states and 757 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:14,924 INFO L93 Difference]: Finished difference Result 433 states and 1252 transitions. [2021-08-06 14:32:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:32:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:14,937 INFO L225 Difference]: With dead ends: 433 [2021-08-06 14:32:14,938 INFO L226 Difference]: Without dead ends: 406 [2021-08-06 14:32:14,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:32:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-06 14:32:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 257. [2021-08-06 14:32:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.09375) internal successors, (792), 256 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 792 transitions. [2021-08-06 14:32:14,944 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 792 transitions. Word has length 18 [2021-08-06 14:32:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:14,944 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 792 transitions. [2021-08-06 14:32:14,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 792 transitions. [2021-08-06 14:32:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:14,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:14,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:14,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:15,173 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,SelfDestructingSolverStorable38 [2021-08-06 14:32:15,173 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1437942816, now seen corresponding path program 3 times [2021-08-06 14:32:15,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:15,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596272041] [2021-08-06 14:32:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:15,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:15,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:15,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596272041] [2021-08-06 14:32:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596272041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:15,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322552256] [2021-08-06 14:32:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:15,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:15,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:15,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:32:15,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-08-06 14:32:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:32:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:32:15,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322552256] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:15,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:15,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-06 14:32:15,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138853543] [2021-08-06 14:32:15,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:32:15,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:15,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:32:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:15,785 INFO L87 Difference]: Start difference. First operand 257 states and 792 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:15,966 INFO L93 Difference]: Finished difference Result 446 states and 1306 transitions. [2021-08-06 14:32:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:32:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:15,968 INFO L225 Difference]: With dead ends: 446 [2021-08-06 14:32:15,968 INFO L226 Difference]: Without dead ends: 419 [2021-08-06 14:32:15,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-06 14:32:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 268. [2021-08-06 14:32:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.142322097378277) internal successors, (839), 267 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 839 transitions. [2021-08-06 14:32:15,974 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 839 transitions. Word has length 18 [2021-08-06 14:32:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:15,974 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 839 transitions. [2021-08-06 14:32:15,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 839 transitions. [2021-08-06 14:32:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:15,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:15,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:16,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:16,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 14:32:16,197 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1403492240, now seen corresponding path program 4 times [2021-08-06 14:32:16,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:16,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218159813] [2021-08-06 14:32:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:16,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:16,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:16,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218159813] [2021-08-06 14:32:16,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218159813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:16,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104930466] [2021-08-06 14:32:16,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:32:16,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:16,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:32:16,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:32:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:16,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:16,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:16,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104930466] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:16,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:16,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-08-06 14:32:16,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616340822] [2021-08-06 14:32:16,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:16,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:16,643 INFO L87 Difference]: Start difference. First operand 268 states and 839 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:16,783 INFO L93 Difference]: Finished difference Result 504 states and 1493 transitions. [2021-08-06 14:32:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:16,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:16,785 INFO L225 Difference]: With dead ends: 504 [2021-08-06 14:32:16,786 INFO L226 Difference]: Without dead ends: 504 [2021-08-06 14:32:16,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-06 14:32:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 272. [2021-08-06 14:32:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.1549815498154983) internal successors, (855), 271 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 855 transitions. [2021-08-06 14:32:16,793 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 855 transitions. Word has length 18 [2021-08-06 14:32:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:16,793 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 855 transitions. [2021-08-06 14:32:16,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 855 transitions. [2021-08-06 14:32:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:16,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:16,794 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:16,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:17,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:17,020 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1230244548, now seen corresponding path program 5 times [2021-08-06 14:32:17,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:17,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117730707] [2021-08-06 14:32:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:17,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:17,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:17,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117730707] [2021-08-06 14:32:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117730707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:17,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264501928] [2021-08-06 14:32:17,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:32:17,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:17,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:17,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:32:17,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:32:17,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:17,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:17,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:17,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264501928] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:17,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:17,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-08-06 14:32:17,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691328135] [2021-08-06 14:32:17,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:17,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:17,459 INFO L87 Difference]: Start difference. First operand 272 states and 855 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:17,579 INFO L93 Difference]: Finished difference Result 462 states and 1385 transitions. [2021-08-06 14:32:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:17,581 INFO L225 Difference]: With dead ends: 462 [2021-08-06 14:32:17,581 INFO L226 Difference]: Without dead ends: 462 [2021-08-06 14:32:17,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:32:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-06 14:32:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 274. [2021-08-06 14:32:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1575091575091574) internal successors, (862), 273 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 862 transitions. [2021-08-06 14:32:17,591 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 862 transitions. Word has length 18 [2021-08-06 14:32:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:17,591 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 862 transitions. [2021-08-06 14:32:17,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 862 transitions. [2021-08-06 14:32:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:17,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:17,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:17,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:17,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:17,805 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 889456409, now seen corresponding path program 4 times [2021-08-06 14:32:17,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:17,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614745778] [2021-08-06 14:32:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:17,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:17,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:17,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614745778] [2021-08-06 14:32:17,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614745778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:17,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:17,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:17,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291772110] [2021-08-06 14:32:17,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:17,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:17,911 INFO L87 Difference]: Start difference. First operand 274 states and 862 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:18,092 INFO L93 Difference]: Finished difference Result 630 states and 1833 transitions. [2021-08-06 14:32:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:18,093 INFO L225 Difference]: With dead ends: 630 [2021-08-06 14:32:18,093 INFO L226 Difference]: Without dead ends: 630 [2021-08-06 14:32:18,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-08-06 14:32:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 288. [2021-08-06 14:32:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.1986062717770034) internal successors, (918), 287 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) [2021-08-06 14:32:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 918 transitions. [2021-08-06 14:32:18,101 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 918 transitions. Word has length 18 [2021-08-06 14:32:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:18,101 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 918 transitions. [2021-08-06 14:32:18,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 918 transitions. [2021-08-06 14:32:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:18,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:18,102 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:18,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-06 14:32:18,102 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:18,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1475366529, now seen corresponding path program 5 times [2021-08-06 14:32:18,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:18,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47503586] [2021-08-06 14:32:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:18,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:18,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:18,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47503586] [2021-08-06 14:32:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47503586] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:18,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:18,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:18,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386868071] [2021-08-06 14:32:18,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:18,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:18,215 INFO L87 Difference]: Start difference. First operand 288 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:18,444 INFO L93 Difference]: Finished difference Result 597 states and 1730 transitions. [2021-08-06 14:32:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:18,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:18,446 INFO L225 Difference]: With dead ends: 597 [2021-08-06 14:32:18,446 INFO L226 Difference]: Without dead ends: 579 [2021-08-06 14:32:18,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-06 14:32:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 288. [2021-08-06 14:32:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.181184668989547) internal successors, (913), 287 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 913 transitions. [2021-08-06 14:32:18,452 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 913 transitions. Word has length 18 [2021-08-06 14:32:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:18,452 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 913 transitions. [2021-08-06 14:32:18,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 913 transitions. [2021-08-06 14:32:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:18,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:18,453 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:18,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-06 14:32:18,454 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1380628897, now seen corresponding path program 5 times [2021-08-06 14:32:18,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:18,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652835127] [2021-08-06 14:32:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:18,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:18,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:18,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652835127] [2021-08-06 14:32:18,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652835127] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:18,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:18,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:18,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445943849] [2021-08-06 14:32:18,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:18,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:18,552 INFO L87 Difference]: Start difference. First operand 288 states and 913 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:18,724 INFO L93 Difference]: Finished difference Result 671 states and 1926 transitions. [2021-08-06 14:32:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:18,726 INFO L225 Difference]: With dead ends: 671 [2021-08-06 14:32:18,726 INFO L226 Difference]: Without dead ends: 671 [2021-08-06 14:32:18,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-08-06 14:32:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 294. [2021-08-06 14:32:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.2013651877133107) internal successors, (938), 293 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) [2021-08-06 14:32:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 938 transitions. [2021-08-06 14:32:18,734 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 938 transitions. Word has length 18 [2021-08-06 14:32:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:18,734 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 938 transitions. [2021-08-06 14:32:18,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 938 transitions. [2021-08-06 14:32:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:18,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:18,735 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:18,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-06 14:32:18,736 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash -498551463, now seen corresponding path program 6 times [2021-08-06 14:32:18,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:18,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736253727] [2021-08-06 14:32:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:18,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:18,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:18,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736253727] [2021-08-06 14:32:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736253727] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:18,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:18,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:18,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349473589] [2021-08-06 14:32:18,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:18,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:18,817 INFO L87 Difference]: Start difference. First operand 294 states and 938 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:18,967 INFO L93 Difference]: Finished difference Result 628 states and 1817 transitions. [2021-08-06 14:32:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:18,969 INFO L225 Difference]: With dead ends: 628 [2021-08-06 14:32:18,969 INFO L226 Difference]: Without dead ends: 622 [2021-08-06 14:32:18,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-06 14:32:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 292. [2021-08-06 14:32:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.185567010309278) internal successors, (927), 291 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) [2021-08-06 14:32:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 927 transitions. [2021-08-06 14:32:18,975 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 927 transitions. Word has length 18 [2021-08-06 14:32:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:18,975 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 927 transitions. [2021-08-06 14:32:18,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 927 transitions. [2021-08-06 14:32:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:18,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:18,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:18,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-06 14:32:18,977 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash 454705420, now seen corresponding path program 6 times [2021-08-06 14:32:18,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:18,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622656784] [2021-08-06 14:32:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:18,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:19,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:19,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622656784] [2021-08-06 14:32:19,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622656784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:19,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571359994] [2021-08-06 14:32:19,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:19,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:19,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:19,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:19,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:32:19,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-08-06 14:32:19,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:19,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:32:19,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:32:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571359994] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:19,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:19,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-06 14:32:19,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862126266] [2021-08-06 14:32:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:32:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:32:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:19,792 INFO L87 Difference]: Start difference. First operand 292 states and 927 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:19,979 INFO L93 Difference]: Finished difference Result 440 states and 1318 transitions. [2021-08-06 14:32:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:32:19,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:19,981 INFO L225 Difference]: With dead ends: 440 [2021-08-06 14:32:19,981 INFO L226 Difference]: Without dead ends: 413 [2021-08-06 14:32:19,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-06 14:32:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 276. [2021-08-06 14:32:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 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) [2021-08-06 14:32:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-08-06 14:32:19,986 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-08-06 14:32:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:19,986 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-08-06 14:32:19,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-08-06 14:32:19,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:19,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:19,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:20,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:20,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:20,201 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1912530013, now seen corresponding path program 7 times [2021-08-06 14:32:20,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:20,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571077214] [2021-08-06 14:32:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:20,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:20,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:20,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571077214] [2021-08-06 14:32:20,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571077214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:20,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076293595] [2021-08-06 14:32:20,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:20,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:20,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:20,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:20,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:32:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:20,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076293595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:20,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:20,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 14:32:20,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271832415] [2021-08-06 14:32:20,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:32:20,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:32:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:20,869 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:21,151 INFO L93 Difference]: Finished difference Result 625 states and 1805 transitions. [2021-08-06 14:32:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:21,154 INFO L225 Difference]: With dead ends: 625 [2021-08-06 14:32:21,154 INFO L226 Difference]: Without dead ends: 625 [2021-08-06 14:32:21,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-08-06 14:32:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 266. [2021-08-06 14:32:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.116981132075472) internal successors, (826), 265 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 826 transitions. [2021-08-06 14:32:21,161 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 826 transitions. Word has length 18 [2021-08-06 14:32:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:21,161 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 826 transitions. [2021-08-06 14:32:21,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 826 transitions. [2021-08-06 14:32:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:21,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:21,162 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:21,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:21,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:21,381 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash -701371553, now seen corresponding path program 8 times [2021-08-06 14:32:21,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:21,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940845114] [2021-08-06 14:32:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:21,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:21,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:21,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940845114] [2021-08-06 14:32:21,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940845114] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:21,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:21,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:21,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229749428] [2021-08-06 14:32:21,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:21,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:21,465 INFO L87 Difference]: Start difference. First operand 266 states and 826 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:21,604 INFO L93 Difference]: Finished difference Result 592 states and 1723 transitions. [2021-08-06 14:32:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:21,606 INFO L225 Difference]: With dead ends: 592 [2021-08-06 14:32:21,606 INFO L226 Difference]: Without dead ends: 592 [2021-08-06 14:32:21,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-06 14:32:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 269. [2021-08-06 14:32:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.138059701492537) internal successors, (841), 268 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) [2021-08-06 14:32:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 841 transitions. [2021-08-06 14:32:21,611 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 841 transitions. Word has length 18 [2021-08-06 14:32:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:21,611 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 841 transitions. [2021-08-06 14:32:21,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 841 transitions. [2021-08-06 14:32:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:21,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:21,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:21,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-06 14:32:21,613 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:21,613 INFO L82 PathProgramCache]: Analyzing trace with hash 572783301, now seen corresponding path program 9 times [2021-08-06 14:32:21,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:21,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584239079] [2021-08-06 14:32:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:21,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:21,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:21,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584239079] [2021-08-06 14:32:21,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584239079] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:21,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:21,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:21,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314889598] [2021-08-06 14:32:21,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:21,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:21,722 INFO L87 Difference]: Start difference. First operand 269 states and 841 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:21,856 INFO L93 Difference]: Finished difference Result 559 states and 1646 transitions. [2021-08-06 14:32:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:21,858 INFO L225 Difference]: With dead ends: 559 [2021-08-06 14:32:21,858 INFO L226 Difference]: Without dead ends: 559 [2021-08-06 14:32:21,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-06 14:32:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 271. [2021-08-06 14:32:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.140740740740741) internal successors, (848), 270 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) [2021-08-06 14:32:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 848 transitions. [2021-08-06 14:32:21,866 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 848 transitions. Word has length 18 [2021-08-06 14:32:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:21,866 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 848 transitions. [2021-08-06 14:32:21,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 848 transitions. [2021-08-06 14:32:21,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:21,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:21,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:21,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-06 14:32:21,867 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:21,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1423509395, now seen corresponding path program 6 times [2021-08-06 14:32:21,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:21,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839111762] [2021-08-06 14:32:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:21,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:21,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:21,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839111762] [2021-08-06 14:32:21,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839111762] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:21,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:21,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:21,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375818116] [2021-08-06 14:32:21,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:21,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:21,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:21,979 INFO L87 Difference]: Start difference. First operand 271 states and 848 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:22,112 INFO L93 Difference]: Finished difference Result 523 states and 1528 transitions. [2021-08-06 14:32:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:22,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:22,114 INFO L225 Difference]: With dead ends: 523 [2021-08-06 14:32:22,114 INFO L226 Difference]: Without dead ends: 505 [2021-08-06 14:32:22,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-06 14:32:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 275. [2021-08-06 14:32:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.1313868613138687) internal successors, (858), 274 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 858 transitions. [2021-08-06 14:32:22,121 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 858 transitions. Word has length 18 [2021-08-06 14:32:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:22,122 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 858 transitions. [2021-08-06 14:32:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 858 transitions. [2021-08-06 14:32:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:22,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:22,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:22,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-06 14:32:22,124 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash 366573125, now seen corresponding path program 7 times [2021-08-06 14:32:22,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:22,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319601249] [2021-08-06 14:32:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:22,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:22,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:22,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319601249] [2021-08-06 14:32:22,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319601249] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:22,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:22,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:22,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197154324] [2021-08-06 14:32:22,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:22,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:22,210 INFO L87 Difference]: Start difference. First operand 275 states and 858 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:22,342 INFO L93 Difference]: Finished difference Result 513 states and 1507 transitions. [2021-08-06 14:32:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:22,343 INFO L225 Difference]: With dead ends: 513 [2021-08-06 14:32:22,343 INFO L226 Difference]: Without dead ends: 506 [2021-08-06 14:32:22,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-06 14:32:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 286. [2021-08-06 14:32:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.112280701754386) internal successors, (887), 285 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 887 transitions. [2021-08-06 14:32:22,349 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 887 transitions. Word has length 18 [2021-08-06 14:32:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:22,349 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 887 transitions. [2021-08-06 14:32:22,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 887 transitions. [2021-08-06 14:32:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:22,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:22,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:22,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-06 14:32:22,350 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:22,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1435810591, now seen corresponding path program 8 times [2021-08-06 14:32:22,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:22,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295165221] [2021-08-06 14:32:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:22,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:22,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:22,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295165221] [2021-08-06 14:32:22,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295165221] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:22,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:22,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:22,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983555238] [2021-08-06 14:32:22,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:22,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:22,433 INFO L87 Difference]: Start difference. First operand 286 states and 887 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:22,533 INFO L93 Difference]: Finished difference Result 482 states and 1450 transitions. [2021-08-06 14:32:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:22,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:22,535 INFO L225 Difference]: With dead ends: 482 [2021-08-06 14:32:22,535 INFO L226 Difference]: Without dead ends: 482 [2021-08-06 14:32:22,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-06 14:32:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 275. [2021-08-06 14:32:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.1313868613138687) internal successors, (858), 274 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 858 transitions. [2021-08-06 14:32:22,542 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 858 transitions. Word has length 18 [2021-08-06 14:32:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:22,542 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 858 transitions. [2021-08-06 14:32:22,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 858 transitions. [2021-08-06 14:32:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:22,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:22,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:22,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-06 14:32:22,543 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:22,543 INFO L82 PathProgramCache]: Analyzing trace with hash -178316529, now seen corresponding path program 10 times [2021-08-06 14:32:22,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:22,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849579577] [2021-08-06 14:32:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:22,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:22,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:22,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849579577] [2021-08-06 14:32:22,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849579577] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:22,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:22,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:22,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411009616] [2021-08-06 14:32:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:22,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:22,638 INFO L87 Difference]: Start difference. First operand 275 states and 858 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:22,818 INFO L93 Difference]: Finished difference Result 605 states and 1753 transitions. [2021-08-06 14:32:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:22,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:22,820 INFO L225 Difference]: With dead ends: 605 [2021-08-06 14:32:22,820 INFO L226 Difference]: Without dead ends: 605 [2021-08-06 14:32:22,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-06 14:32:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 283. [2021-08-06 14:32:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.173758865248227) internal successors, (895), 282 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 895 transitions. [2021-08-06 14:32:22,825 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 895 transitions. Word has length 18 [2021-08-06 14:32:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:22,826 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 895 transitions. [2021-08-06 14:32:22,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 895 transitions. [2021-08-06 14:32:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:22,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:22,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:22,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-06 14:32:22,826 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash 703760905, now seen corresponding path program 11 times [2021-08-06 14:32:22,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:22,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786237695] [2021-08-06 14:32:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:22,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:22,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:22,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786237695] [2021-08-06 14:32:22,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786237695] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:22,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:22,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:22,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043633992] [2021-08-06 14:32:22,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:22,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:22,907 INFO L87 Difference]: Start difference. First operand 283 states and 895 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:23,060 INFO L93 Difference]: Finished difference Result 591 states and 1702 transitions. [2021-08-06 14:32:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:23,061 INFO L225 Difference]: With dead ends: 591 [2021-08-06 14:32:23,061 INFO L226 Difference]: Without dead ends: 585 [2021-08-06 14:32:23,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-06 14:32:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 286. [2021-08-06 14:32:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.1473684210526316) internal successors, (897), 285 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 897 transitions. [2021-08-06 14:32:23,067 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 897 transitions. Word has length 18 [2021-08-06 14:32:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:23,067 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 897 transitions. [2021-08-06 14:32:23,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 897 transitions. [2021-08-06 14:32:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:23,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:23,068 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:23,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-06 14:32:23,069 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash 562580805, now seen corresponding path program 12 times [2021-08-06 14:32:23,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:23,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793945200] [2021-08-06 14:32:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:23,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:23,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:23,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793945200] [2021-08-06 14:32:23,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793945200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:23,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319296198] [2021-08-06 14:32:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:23,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:23,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:23,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:32:23,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:32:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:23,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319296198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:23,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:23,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:32:23,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942549363] [2021-08-06 14:32:23,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:32:23,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:32:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:23,721 INFO L87 Difference]: Start difference. First operand 286 states and 897 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:23,998 INFO L93 Difference]: Finished difference Result 601 states and 1736 transitions. [2021-08-06 14:32:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 18 [2021-08-06 14:32:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:24,000 INFO L225 Difference]: With dead ends: 601 [2021-08-06 14:32:24,000 INFO L226 Difference]: Without dead ends: 601 [2021-08-06 14:32:24,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-06 14:32:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 279. [2021-08-06 14:32:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.161870503597122) internal successors, (879), 278 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 879 transitions. [2021-08-06 14:32:24,005 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 879 transitions. Word has length 18 [2021-08-06 14:32:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:24,005 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 879 transitions. [2021-08-06 14:32:24,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 879 transitions. [2021-08-06 14:32:24,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:24,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:24,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:24,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:24,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 14:32:24,209 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1556956425, now seen corresponding path program 13 times [2021-08-06 14:32:24,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:24,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264108836] [2021-08-06 14:32:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:24,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:24,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:24,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264108836] [2021-08-06 14:32:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264108836] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:24,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:24,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:24,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958721433] [2021-08-06 14:32:24,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:24,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:24,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:24,311 INFO L87 Difference]: Start difference. First operand 279 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:24,428 INFO L93 Difference]: Finished difference Result 570 states and 1669 transitions. [2021-08-06 14:32:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:24,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:24,430 INFO L225 Difference]: With dead ends: 570 [2021-08-06 14:32:24,430 INFO L226 Difference]: Without dead ends: 570 [2021-08-06 14:32:24,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-06 14:32:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 276. [2021-08-06 14:32:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1418181818181816) internal successors, (864), 275 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 864 transitions. [2021-08-06 14:32:24,435 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 864 transitions. Word has length 18 [2021-08-06 14:32:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:24,435 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 864 transitions. [2021-08-06 14:32:24,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 864 transitions. [2021-08-06 14:32:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:24,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:24,436 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:24,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-06 14:32:24,436 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:24,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1757557739, now seen corresponding path program 14 times [2021-08-06 14:32:24,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:24,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101555941] [2021-08-06 14:32:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:24,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:24,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:24,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101555941] [2021-08-06 14:32:24,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101555941] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:24,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:24,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:24,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719897076] [2021-08-06 14:32:24,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:24,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:24,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:24,514 INFO L87 Difference]: Start difference. First operand 276 states and 864 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:24,631 INFO L93 Difference]: Finished difference Result 536 states and 1556 transitions. [2021-08-06 14:32:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:24,633 INFO L225 Difference]: With dead ends: 536 [2021-08-06 14:32:24,633 INFO L226 Difference]: Without dead ends: 530 [2021-08-06 14:32:24,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-08-06 14:32:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 286. [2021-08-06 14:32:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.126315789473684) internal successors, (891), 285 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 891 transitions. [2021-08-06 14:32:24,640 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 891 transitions. Word has length 18 [2021-08-06 14:32:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:24,640 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 891 transitions. [2021-08-06 14:32:24,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 891 transitions. [2021-08-06 14:32:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:24,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:24,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:24,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-06 14:32:24,642 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1733657825, now seen corresponding path program 15 times [2021-08-06 14:32:24,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:24,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579788346] [2021-08-06 14:32:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:24,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:24,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:24,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579788346] [2021-08-06 14:32:24,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579788346] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:24,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:24,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:24,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879322645] [2021-08-06 14:32:24,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:24,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:24,740 INFO L87 Difference]: Start difference. First operand 286 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:24,849 INFO L93 Difference]: Finished difference Result 513 states and 1517 transitions. [2021-08-06 14:32:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:24,851 INFO L225 Difference]: With dead ends: 513 [2021-08-06 14:32:24,851 INFO L226 Difference]: Without dead ends: 513 [2021-08-06 14:32:24,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-06 14:32:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 278. [2021-08-06 14:32:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.137184115523466) internal successors, (869), 277 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 869 transitions. [2021-08-06 14:32:24,859 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 869 transitions. Word has length 18 [2021-08-06 14:32:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:24,859 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 869 transitions. [2021-08-06 14:32:24,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 869 transitions. [2021-08-06 14:32:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:24,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:24,860 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:24,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-06 14:32:24,861 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash -907635435, now seen corresponding path program 9 times [2021-08-06 14:32:24,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:24,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492914133] [2021-08-06 14:32:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:24,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:24,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:24,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492914133] [2021-08-06 14:32:24,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492914133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:24,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:24,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:24,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321281635] [2021-08-06 14:32:24,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:24,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:24,938 INFO L87 Difference]: Start difference. First operand 278 states and 869 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:25,100 INFO L93 Difference]: Finished difference Result 576 states and 1655 transitions. [2021-08-06 14:32:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:25,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:25,102 INFO L225 Difference]: With dead ends: 576 [2021-08-06 14:32:25,102 INFO L226 Difference]: Without dead ends: 569 [2021-08-06 14:32:25,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:25,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-06 14:32:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 297. [2021-08-06 14:32:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.125) internal successors, (925), 296 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) [2021-08-06 14:32:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 925 transitions. [2021-08-06 14:32:25,109 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 925 transitions. Word has length 18 [2021-08-06 14:32:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:25,109 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 925 transitions. [2021-08-06 14:32:25,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 925 transitions. [2021-08-06 14:32:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:25,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:25,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:25,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-06 14:32:25,111 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1256692637, now seen corresponding path program 10 times [2021-08-06 14:32:25,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:25,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466612566] [2021-08-06 14:32:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:25,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:25,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:25,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466612566] [2021-08-06 14:32:25,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466612566] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:25,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:25,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:25,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711835463] [2021-08-06 14:32:25,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:25,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:25,191 INFO L87 Difference]: Start difference. First operand 297 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:25,350 INFO L93 Difference]: Finished difference Result 578 states and 1668 transitions. [2021-08-06 14:32:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:25,351 INFO L225 Difference]: With dead ends: 578 [2021-08-06 14:32:25,352 INFO L226 Difference]: Without dead ends: 578 [2021-08-06 14:32:25,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-06 14:32:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 294. [2021-08-06 14:32:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.1296928327645053) internal successors, (917), 293 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 917 transitions. [2021-08-06 14:32:25,359 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 917 transitions. Word has length 18 [2021-08-06 14:32:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:25,359 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 917 transitions. [2021-08-06 14:32:25,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 917 transitions. [2021-08-06 14:32:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:25,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:25,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:25,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-06 14:32:25,361 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1791922439, now seen corresponding path program 11 times [2021-08-06 14:32:25,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:25,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274186942] [2021-08-06 14:32:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:25,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:25,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:25,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274186942] [2021-08-06 14:32:25,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274186942] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:25,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:25,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:25,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141380287] [2021-08-06 14:32:25,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:25,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:25,433 INFO L87 Difference]: Start difference. First operand 294 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:25,586 INFO L93 Difference]: Finished difference Result 612 states and 1768 transitions. [2021-08-06 14:32:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:25,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:25,588 INFO L225 Difference]: With dead ends: 612 [2021-08-06 14:32:25,588 INFO L226 Difference]: Without dead ends: 612 [2021-08-06 14:32:25,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-06 14:32:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 291. [2021-08-06 14:32:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1344827586206896) internal successors, (909), 290 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 909 transitions. [2021-08-06 14:32:25,596 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 909 transitions. Word has length 18 [2021-08-06 14:32:25,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:25,596 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 909 transitions. [2021-08-06 14:32:25,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 909 transitions. [2021-08-06 14:32:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:25,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:25,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:25,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-08-06 14:32:25,598 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1474113580, now seen corresponding path program 7 times [2021-08-06 14:32:25,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:25,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817687666] [2021-08-06 14:32:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:25,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:25,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:25,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817687666] [2021-08-06 14:32:25,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817687666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:25,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051919208] [2021-08-06 14:32:25,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:25,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:25,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:25,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:25,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:32:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:25,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:26,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051919208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:26,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:26,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-08-06 14:32:26,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434432070] [2021-08-06 14:32:26,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:26,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:26,225 INFO L87 Difference]: Start difference. First operand 291 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:26,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:26,382 INFO L93 Difference]: Finished difference Result 535 states and 1604 transitions. [2021-08-06 14:32:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:26,384 INFO L225 Difference]: With dead ends: 535 [2021-08-06 14:32:26,384 INFO L226 Difference]: Without dead ends: 535 [2021-08-06 14:32:26,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:32:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-06 14:32:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 295. [2021-08-06 14:32:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1462585034013606) internal successors, (925), 294 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) [2021-08-06 14:32:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 925 transitions. [2021-08-06 14:32:26,389 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 925 transitions. Word has length 18 [2021-08-06 14:32:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:26,390 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 925 transitions. [2021-08-06 14:32:26,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 925 transitions. [2021-08-06 14:32:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:26,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:26,391 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:26,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:26,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:26,591 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1300865888, now seen corresponding path program 8 times [2021-08-06 14:32:26,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:26,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874608510] [2021-08-06 14:32:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:26,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:26,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:26,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874608510] [2021-08-06 14:32:26,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874608510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:26,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681697688] [2021-08-06 14:32:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:26,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:26,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:26,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:32:26,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-06 14:32:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:32:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:32:27,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681697688] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:27,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:27,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-06 14:32:27,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597362750] [2021-08-06 14:32:27,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:32:27,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:32:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:27,237 INFO L87 Difference]: Start difference. First operand 295 states and 925 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:27,406 INFO L93 Difference]: Finished difference Result 422 states and 1259 transitions. [2021-08-06 14:32:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:32:27,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:27,407 INFO L225 Difference]: With dead ends: 422 [2021-08-06 14:32:27,407 INFO L226 Difference]: Without dead ends: 395 [2021-08-06 14:32:27,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-06 14:32:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 291. [2021-08-06 14:32:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1344827586206896) internal successors, (909), 290 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 909 transitions. [2021-08-06 14:32:27,412 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 909 transitions. Word has length 18 [2021-08-06 14:32:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:27,412 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 909 transitions. [2021-08-06 14:32:27,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 909 transitions. [2021-08-06 14:32:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:27,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:27,413 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:27,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:27,613 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,SelfDestructingSolverStorable63 [2021-08-06 14:32:27,614 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1026939001, now seen corresponding path program 16 times [2021-08-06 14:32:27,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:27,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15540350] [2021-08-06 14:32:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:27,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:27,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:27,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15540350] [2021-08-06 14:32:27,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15540350] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:27,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:27,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:27,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353505929] [2021-08-06 14:32:27,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:27,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:27,702 INFO L87 Difference]: Start difference. First operand 291 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:27,842 INFO L93 Difference]: Finished difference Result 587 states and 1708 transitions. [2021-08-06 14:32:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:27,850 INFO L225 Difference]: With dead ends: 587 [2021-08-06 14:32:27,850 INFO L226 Difference]: Without dead ends: 587 [2021-08-06 14:32:27,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-06 14:32:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 298. [2021-08-06 14:32:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.164983164983165) internal successors, (940), 297 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 940 transitions. [2021-08-06 14:32:27,856 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 940 transitions. Word has length 18 [2021-08-06 14:32:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:27,858 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 940 transitions. [2021-08-06 14:32:27,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 940 transitions. [2021-08-06 14:32:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:27,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:27,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:27,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-06 14:32:27,860 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -144861567, now seen corresponding path program 17 times [2021-08-06 14:32:27,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:27,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267900841] [2021-08-06 14:32:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:27,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:27,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:27,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267900841] [2021-08-06 14:32:27,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267900841] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:27,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:27,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:27,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402749715] [2021-08-06 14:32:27,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:27,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:27,941 INFO L87 Difference]: Start difference. First operand 298 states and 940 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:28,093 INFO L93 Difference]: Finished difference Result 593 states and 1709 transitions. [2021-08-06 14:32:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:28,094 INFO L225 Difference]: With dead ends: 593 [2021-08-06 14:32:28,094 INFO L226 Difference]: Without dead ends: 587 [2021-08-06 14:32:28,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-06 14:32:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 301. [2021-08-06 14:32:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.14) internal successors, (942), 300 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 942 transitions. [2021-08-06 14:32:28,100 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 942 transitions. Word has length 18 [2021-08-06 14:32:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:28,100 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 942 transitions. [2021-08-06 14:32:28,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 942 transitions. [2021-08-06 14:32:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:28,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:28,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:28,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-06 14:32:28,101 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 780242416, now seen corresponding path program 9 times [2021-08-06 14:32:28,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:28,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795432103] [2021-08-06 14:32:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:28,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:28,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:28,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795432103] [2021-08-06 14:32:28,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795432103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:28,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732545883] [2021-08-06 14:32:28,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:28,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:28,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:28,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:28,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:32:28,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-08-06 14:32:28,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:28,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:32:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:32:29,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732545883] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:29,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:32:29,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-08-06 14:32:29,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446130852] [2021-08-06 14:32:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:32:29,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:29,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:32:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:29,033 INFO L87 Difference]: Start difference. First operand 301 states and 942 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:29,211 INFO L93 Difference]: Finished difference Result 445 states and 1328 transitions. [2021-08-06 14:32:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:32:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:29,212 INFO L225 Difference]: With dead ends: 445 [2021-08-06 14:32:29,212 INFO L226 Difference]: Without dead ends: 418 [2021-08-06 14:32:29,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:32:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-06 14:32:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 285. [2021-08-06 14:32:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0985915492957745) internal successors, (880), 284 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 880 transitions. [2021-08-06 14:32:29,217 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 880 transitions. Word has length 18 [2021-08-06 14:32:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:29,217 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 880 transitions. [2021-08-06 14:32:29,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 880 transitions. [2021-08-06 14:32:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:29,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:29,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:29,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:29,418 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,SelfDestructingSolverStorable66 [2021-08-06 14:32:29,418 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:29,418 INFO L82 PathProgramCache]: Analyzing trace with hash -286041667, now seen corresponding path program 18 times [2021-08-06 14:32:29,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:29,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043802379] [2021-08-06 14:32:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:29,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:29,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:29,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043802379] [2021-08-06 14:32:29,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043802379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:29,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089446926] [2021-08-06 14:32:29,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:29,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:29,518 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:29,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:32:29,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:32:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:29,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:30,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089446926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:30,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:30,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:32:30,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218170227] [2021-08-06 14:32:30,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:32:30,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:32:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:30,233 INFO L87 Difference]: Start difference. First operand 285 states and 880 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:30,574 INFO L93 Difference]: Finished difference Result 562 states and 1608 transitions. [2021-08-06 14:32:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 18 [2021-08-06 14:32:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:30,575 INFO L225 Difference]: With dead ends: 562 [2021-08-06 14:32:30,575 INFO L226 Difference]: Without dead ends: 562 [2021-08-06 14:32:30,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-06 14:32:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 278. [2021-08-06 14:32:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.111913357400722) internal successors, (862), 277 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 862 transitions. [2021-08-06 14:32:30,580 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 862 transitions. Word has length 18 [2021-08-06 14:32:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:30,581 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 862 transitions. [2021-08-06 14:32:30,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 862 transitions. [2021-08-06 14:32:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:30,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:30,582 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:30,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:30,805 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,SelfDestructingSolverStorable67 [2021-08-06 14:32:30,805 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash 708333953, now seen corresponding path program 19 times [2021-08-06 14:32:30,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:30,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527621206] [2021-08-06 14:32:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:30,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:30,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:30,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527621206] [2021-08-06 14:32:30,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527621206] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:30,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:30,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:30,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847465879] [2021-08-06 14:32:30,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:30,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:30,897 INFO L87 Difference]: Start difference. First operand 278 states and 862 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:31,012 INFO L93 Difference]: Finished difference Result 525 states and 1526 transitions. [2021-08-06 14:32:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:31,013 INFO L225 Difference]: With dead ends: 525 [2021-08-06 14:32:31,013 INFO L226 Difference]: Without dead ends: 525 [2021-08-06 14:32:31,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-06 14:32:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 275. [2021-08-06 14:32:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.091240875912409) internal successors, (847), 274 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 847 transitions. [2021-08-06 14:32:31,019 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 847 transitions. Word has length 18 [2021-08-06 14:32:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:31,019 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 847 transitions. [2021-08-06 14:32:31,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 847 transitions. [2021-08-06 14:32:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:31,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:31,020 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:31,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-06 14:32:31,020 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1688787085, now seen corresponding path program 20 times [2021-08-06 14:32:31,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:31,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770255355] [2021-08-06 14:32:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:31,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:31,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:31,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770255355] [2021-08-06 14:32:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770255355] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:31,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:31,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:31,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385601026] [2021-08-06 14:32:31,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:31,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:31,111 INFO L87 Difference]: Start difference. First operand 275 states and 847 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:31,255 INFO L93 Difference]: Finished difference Result 562 states and 1600 transitions. [2021-08-06 14:32:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:31,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:31,256 INFO L225 Difference]: With dead ends: 562 [2021-08-06 14:32:31,256 INFO L226 Difference]: Without dead ends: 556 [2021-08-06 14:32:31,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-06 14:32:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 285. [2021-08-06 14:32:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0774647887323945) internal successors, (874), 284 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-06 14:32:31,268 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-06 14:32:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:31,268 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-06 14:32:31,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-06 14:32:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:31,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:31,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:31,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-06 14:32:31,269 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1712686999, now seen corresponding path program 21 times [2021-08-06 14:32:31,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:31,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868264601] [2021-08-06 14:32:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:31,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:31,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:31,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868264601] [2021-08-06 14:32:31,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868264601] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:31,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:31,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:31,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498188408] [2021-08-06 14:32:31,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:31,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:31,374 INFO L87 Difference]: Start difference. First operand 285 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:31,499 INFO L93 Difference]: Finished difference Result 539 states and 1561 transitions. [2021-08-06 14:32:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:31,500 INFO L225 Difference]: With dead ends: 539 [2021-08-06 14:32:31,500 INFO L226 Difference]: Without dead ends: 539 [2021-08-06 14:32:31,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-06 14:32:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 274. [2021-08-06 14:32:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.0805860805860807) internal successors, (841), 273 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) [2021-08-06 14:32:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 841 transitions. [2021-08-06 14:32:31,506 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 841 transitions. Word has length 18 [2021-08-06 14:32:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:31,506 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 841 transitions. [2021-08-06 14:32:31,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 841 transitions. [2021-08-06 14:32:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:31,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:31,507 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:31,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-06 14:32:31,507 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -686499573, now seen corresponding path program 12 times [2021-08-06 14:32:31,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:31,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913665765] [2021-08-06 14:32:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:31,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:31,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:31,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913665765] [2021-08-06 14:32:31,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913665765] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:31,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:31,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:31,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613965662] [2021-08-06 14:32:31,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:31,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:31,580 INFO L87 Difference]: Start difference. First operand 274 states and 841 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:31,710 INFO L93 Difference]: Finished difference Result 576 states and 1656 transitions. [2021-08-06 14:32:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:31,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:31,711 INFO L225 Difference]: With dead ends: 576 [2021-08-06 14:32:31,711 INFO L226 Difference]: Without dead ends: 576 [2021-08-06 14:32:31,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-08-06 14:32:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 261. [2021-08-06 14:32:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.080769230769231) internal successors, (801), 260 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 801 transitions. [2021-08-06 14:32:31,717 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 801 transitions. Word has length 18 [2021-08-06 14:32:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:31,717 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 801 transitions. [2021-08-06 14:32:31,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 801 transitions. [2021-08-06 14:32:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:31,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:31,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:31,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-06 14:32:31,718 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash -846127271, now seen corresponding path program 22 times [2021-08-06 14:32:31,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:31,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145525579] [2021-08-06 14:32:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:31,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:31,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:31,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145525579] [2021-08-06 14:32:31,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145525579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:31,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:31,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:31,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344721021] [2021-08-06 14:32:31,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:31,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:31,791 INFO L87 Difference]: Start difference. First operand 261 states and 801 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:31,916 INFO L93 Difference]: Finished difference Result 487 states and 1399 transitions. [2021-08-06 14:32:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:31,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:31,918 INFO L225 Difference]: With dead ends: 487 [2021-08-06 14:32:31,918 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 14:32:31,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 14:32:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 273. [2021-08-06 14:32:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0625) internal successors, (833), 272 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 833 transitions. [2021-08-06 14:32:31,922 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 833 transitions. Word has length 18 [2021-08-06 14:32:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:31,922 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 833 transitions. [2021-08-06 14:32:31,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 833 transitions. [2021-08-06 14:32:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:31,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:31,923 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-06 14:32:31,923 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash -822227357, now seen corresponding path program 23 times [2021-08-06 14:32:31,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:31,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445667915] [2021-08-06 14:32:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:31,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:32,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:32,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445667915] [2021-08-06 14:32:32,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445667915] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:32,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:32,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:32,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720202395] [2021-08-06 14:32:32,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:32,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:32,010 INFO L87 Difference]: Start difference. First operand 273 states and 833 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:32,121 INFO L93 Difference]: Finished difference Result 458 states and 1345 transitions. [2021-08-06 14:32:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:32,122 INFO L225 Difference]: With dead ends: 458 [2021-08-06 14:32:32,122 INFO L226 Difference]: Without dead ends: 458 [2021-08-06 14:32:32,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-06 14:32:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 263. [2021-08-06 14:32:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0763358778625953) internal successors, (806), 262 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 806 transitions. [2021-08-06 14:32:32,127 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 806 transitions. Word has length 18 [2021-08-06 14:32:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:32,127 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 806 transitions. [2021-08-06 14:32:32,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 806 transitions. [2021-08-06 14:32:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:32,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:32,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:32,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-06 14:32:32,129 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 404240159, now seen corresponding path program 24 times [2021-08-06 14:32:32,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:32,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614301159] [2021-08-06 14:32:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:32,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:32,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:32,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614301159] [2021-08-06 14:32:32,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614301159] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:32,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:32,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:32,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550271380] [2021-08-06 14:32:32,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:32,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:32,230 INFO L87 Difference]: Start difference. First operand 263 states and 806 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:32,360 INFO L93 Difference]: Finished difference Result 436 states and 1281 transitions. [2021-08-06 14:32:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:32,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:32,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:32,361 INFO L225 Difference]: With dead ends: 436 [2021-08-06 14:32:32,361 INFO L226 Difference]: Without dead ends: 436 [2021-08-06 14:32:32,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-06 14:32:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 270. [2021-08-06 14:32:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.100371747211896) internal successors, (834), 269 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 834 transitions. [2021-08-06 14:32:32,366 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 834 transitions. Word has length 18 [2021-08-06 14:32:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:32,366 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 834 transitions. [2021-08-06 14:32:32,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 834 transitions. [2021-08-06 14:32:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:32,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:32,367 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:32,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-06 14:32:32,367 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:32,368 INFO L82 PathProgramCache]: Analyzing trace with hash 990150279, now seen corresponding path program 13 times [2021-08-06 14:32:32,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:32,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152306964] [2021-08-06 14:32:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:32,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:32,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:32,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152306964] [2021-08-06 14:32:32,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152306964] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:32,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:32,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:32,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507116520] [2021-08-06 14:32:32,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:32,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:32,479 INFO L87 Difference]: Start difference. First operand 270 states and 834 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:32,581 INFO L93 Difference]: Finished difference Result 487 states and 1391 transitions. [2021-08-06 14:32:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:32,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:32,582 INFO L225 Difference]: With dead ends: 487 [2021-08-06 14:32:32,582 INFO L226 Difference]: Without dead ends: 469 [2021-08-06 14:32:32,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-06 14:32:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 270. [2021-08-06 14:32:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.0817843866171004) internal successors, (829), 269 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) [2021-08-06 14:32:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 829 transitions. [2021-08-06 14:32:32,587 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 829 transitions. Word has length 18 [2021-08-06 14:32:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:32,587 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 829 transitions. [2021-08-06 14:32:32,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 829 transitions. [2021-08-06 14:32:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:32,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:32,588 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:32,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-06 14:32:32,588 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1865845147, now seen corresponding path program 25 times [2021-08-06 14:32:32,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:32,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922557333] [2021-08-06 14:32:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:32,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:32,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:32,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922557333] [2021-08-06 14:32:32,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922557333] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:32,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:32,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:32,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479860335] [2021-08-06 14:32:32,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:32,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:32,664 INFO L87 Difference]: Start difference. First operand 270 states and 829 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:32,815 INFO L93 Difference]: Finished difference Result 477 states and 1374 transitions. [2021-08-06 14:32:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:32,817 INFO L225 Difference]: With dead ends: 477 [2021-08-06 14:32:32,817 INFO L226 Difference]: Without dead ends: 477 [2021-08-06 14:32:32,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-08-06 14:32:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 276. [2021-08-06 14:32:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1054545454545455) internal successors, (854), 275 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 854 transitions. [2021-08-06 14:32:32,821 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 854 transitions. Word has length 18 [2021-08-06 14:32:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:32,821 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 854 transitions. [2021-08-06 14:32:32,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 854 transitions. [2021-08-06 14:32:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:32,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:32,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:32,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-06 14:32:32,822 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:32,822 INFO L82 PathProgramCache]: Analyzing trace with hash -983767713, now seen corresponding path program 26 times [2021-08-06 14:32:32,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:32,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751346618] [2021-08-06 14:32:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:32,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:32,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:32,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751346618] [2021-08-06 14:32:32,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751346618] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:32,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:32,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:32,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818618100] [2021-08-06 14:32:32,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:32,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:32,909 INFO L87 Difference]: Start difference. First operand 276 states and 854 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:33,057 INFO L93 Difference]: Finished difference Result 434 states and 1265 transitions. [2021-08-06 14:32:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:33,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:33,062 INFO L225 Difference]: With dead ends: 434 [2021-08-06 14:32:33,062 INFO L226 Difference]: Without dead ends: 428 [2021-08-06 14:32:33,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-06 14:32:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 274. [2021-08-06 14:32:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.087912087912088) internal successors, (843), 273 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 843 transitions. [2021-08-06 14:32:33,066 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 843 transitions. Word has length 18 [2021-08-06 14:32:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:33,066 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 843 transitions. [2021-08-06 14:32:33,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 843 transitions. [2021-08-06 14:32:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:33,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:33,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:33,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-06 14:32:33,066 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1897221033, now seen corresponding path program 27 times [2021-08-06 14:32:33,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:33,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344150197] [2021-08-06 14:32:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:33,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:33,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:33,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344150197] [2021-08-06 14:32:33,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344150197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:33,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287446207] [2021-08-06 14:32:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:33,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:33,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:33,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:33,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:32:33,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:32:33,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:33,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287446207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:33,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:33,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 14:32:33,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926509286] [2021-08-06 14:32:33,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:32:33,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:32:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:33,768 INFO L87 Difference]: Start difference. First operand 274 states and 843 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:33,876 INFO L93 Difference]: Finished difference Result 548 states and 1586 transitions. [2021-08-06 14:32:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:33,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 18 [2021-08-06 14:32:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:33,877 INFO L225 Difference]: With dead ends: 548 [2021-08-06 14:32:33,877 INFO L226 Difference]: Without dead ends: 548 [2021-08-06 14:32:33,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-08-06 14:32:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 280. [2021-08-06 14:32:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-08-06 14:32:33,883 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-08-06 14:32:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:33,883 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-08-06 14:32:33,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-08-06 14:32:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:33,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:33,884 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:33,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:34,092 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,SelfDestructingSolverStorable78 [2021-08-06 14:32:34,093 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1186587803, now seen corresponding path program 28 times [2021-08-06 14:32:34,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:34,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338904946] [2021-08-06 14:32:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:34,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:34,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:34,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338904946] [2021-08-06 14:32:34,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338904946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:34,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:34,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:34,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935919532] [2021-08-06 14:32:34,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:34,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:34,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:34,187 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:34,327 INFO L93 Difference]: Finished difference Result 515 states and 1504 transitions. [2021-08-06 14:32:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:34,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:34,328 INFO L225 Difference]: With dead ends: 515 [2021-08-06 14:32:34,328 INFO L226 Difference]: Without dead ends: 515 [2021-08-06 14:32:34,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-06 14:32:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 283. [2021-08-06 14:32:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.127659574468085) internal successors, (882), 282 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 882 transitions. [2021-08-06 14:32:34,334 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 882 transitions. Word has length 18 [2021-08-06 14:32:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:34,334 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 882 transitions. [2021-08-06 14:32:34,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 882 transitions. [2021-08-06 14:32:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:34,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:34,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:34,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-08-06 14:32:34,335 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash 87567051, now seen corresponding path program 29 times [2021-08-06 14:32:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:34,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170137813] [2021-08-06 14:32:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:34,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:34,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:34,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170137813] [2021-08-06 14:32:34,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170137813] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:34,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:34,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:34,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421650863] [2021-08-06 14:32:34,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:34,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:34,414 INFO L87 Difference]: Start difference. First operand 283 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:34,546 INFO L93 Difference]: Finished difference Result 482 states and 1427 transitions. [2021-08-06 14:32:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:34,547 INFO L225 Difference]: With dead ends: 482 [2021-08-06 14:32:34,547 INFO L226 Difference]: Without dead ends: 482 [2021-08-06 14:32:34,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-06 14:32:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 274. [2021-08-06 14:32:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.087912087912088) internal successors, (843), 273 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 843 transitions. [2021-08-06 14:32:34,553 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 843 transitions. Word has length 18 [2021-08-06 14:32:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:34,553 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 843 transitions. [2021-08-06 14:32:34,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 843 transitions. [2021-08-06 14:32:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:34,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:34,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:34,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-06 14:32:34,554 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1908725645, now seen corresponding path program 14 times [2021-08-06 14:32:34,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:34,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635404183] [2021-08-06 14:32:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:34,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:34,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:34,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635404183] [2021-08-06 14:32:34,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635404183] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:34,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:34,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:34,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616947940] [2021-08-06 14:32:34,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:34,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:34,628 INFO L87 Difference]: Start difference. First operand 274 states and 843 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:34,741 INFO L93 Difference]: Finished difference Result 542 states and 1526 transitions. [2021-08-06 14:32:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:34,742 INFO L225 Difference]: With dead ends: 542 [2021-08-06 14:32:34,742 INFO L226 Difference]: Without dead ends: 524 [2021-08-06 14:32:34,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-06 14:32:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 278. [2021-08-06 14:32:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.07942238267148) internal successors, (853), 277 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 853 transitions. [2021-08-06 14:32:34,748 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 853 transitions. Word has length 18 [2021-08-06 14:32:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:34,748 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 853 transitions. [2021-08-06 14:32:34,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 853 transitions. [2021-08-06 14:32:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:34,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:34,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:34,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-06 14:32:34,750 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash -118643125, now seen corresponding path program 15 times [2021-08-06 14:32:34,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:34,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179695390] [2021-08-06 14:32:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:34,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:34,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:34,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179695390] [2021-08-06 14:32:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179695390] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:34,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:34,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:34,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701283615] [2021-08-06 14:32:34,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:34,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:34,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:34,832 INFO L87 Difference]: Start difference. First operand 278 states and 853 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:34,953 INFO L93 Difference]: Finished difference Result 532 states and 1505 transitions. [2021-08-06 14:32:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:34,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:34,954 INFO L225 Difference]: With dead ends: 532 [2021-08-06 14:32:34,954 INFO L226 Difference]: Without dead ends: 525 [2021-08-06 14:32:34,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-06 14:32:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 289. [2021-08-06 14:32:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.0625) internal successors, (882), 288 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 882 transitions. [2021-08-06 14:32:34,959 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 882 transitions. Word has length 18 [2021-08-06 14:32:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:34,959 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 882 transitions. [2021-08-06 14:32:34,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 882 transitions. [2021-08-06 14:32:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:34,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:34,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:34,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-06 14:32:34,960 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 950594341, now seen corresponding path program 16 times [2021-08-06 14:32:34,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:34,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561778800] [2021-08-06 14:32:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:34,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:35,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:35,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561778800] [2021-08-06 14:32:35,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561778800] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:35,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:35,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:35,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147755759] [2021-08-06 14:32:35,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:35,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:35,047 INFO L87 Difference]: Start difference. First operand 289 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:35,164 INFO L93 Difference]: Finished difference Result 501 states and 1448 transitions. [2021-08-06 14:32:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:35,165 INFO L225 Difference]: With dead ends: 501 [2021-08-06 14:32:35,165 INFO L226 Difference]: Without dead ends: 501 [2021-08-06 14:32:35,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-06 14:32:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 274. [2021-08-06 14:32:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.087912087912088) internal successors, (843), 273 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 843 transitions. [2021-08-06 14:32:35,169 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 843 transitions. Word has length 18 [2021-08-06 14:32:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:35,169 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 843 transitions. [2021-08-06 14:32:35,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 843 transitions. [2021-08-06 14:32:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:35,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:35,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:35,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-06 14:32:35,170 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:35,171 INFO L82 PathProgramCache]: Analyzing trace with hash -663532779, now seen corresponding path program 30 times [2021-08-06 14:32:35,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:35,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071659907] [2021-08-06 14:32:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:35,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:35,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:35,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071659907] [2021-08-06 14:32:35,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071659907] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:35,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:35,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:35,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790451288] [2021-08-06 14:32:35,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:35,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:35,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:35,248 INFO L87 Difference]: Start difference. First operand 274 states and 843 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:35,404 INFO L93 Difference]: Finished difference Result 555 states and 1597 transitions. [2021-08-06 14:32:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:35,405 INFO L225 Difference]: With dead ends: 555 [2021-08-06 14:32:35,405 INFO L226 Difference]: Without dead ends: 555 [2021-08-06 14:32:35,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-08-06 14:32:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 281. [2021-08-06 14:32:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.1214285714285714) internal successors, (874), 280 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 874 transitions. [2021-08-06 14:32:35,412 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 874 transitions. Word has length 18 [2021-08-06 14:32:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:35,412 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 874 transitions. [2021-08-06 14:32:35,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 874 transitions. [2021-08-06 14:32:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:35,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:35,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:35,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-08-06 14:32:35,414 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash 218544655, now seen corresponding path program 31 times [2021-08-06 14:32:35,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:35,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246193838] [2021-08-06 14:32:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:35,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:35,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:35,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246193838] [2021-08-06 14:32:35,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246193838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:35,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:35,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:35,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370006616] [2021-08-06 14:32:35,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:35,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:35,492 INFO L87 Difference]: Start difference. First operand 281 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:35,643 INFO L93 Difference]: Finished difference Result 541 states and 1546 transitions. [2021-08-06 14:32:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:35,645 INFO L225 Difference]: With dead ends: 541 [2021-08-06 14:32:35,645 INFO L226 Difference]: Without dead ends: 535 [2021-08-06 14:32:35,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-06 14:32:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 275. [2021-08-06 14:32:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0985401459854014) internal successors, (849), 274 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 849 transitions. [2021-08-06 14:32:35,652 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 849 transitions. Word has length 18 [2021-08-06 14:32:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:35,652 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 849 transitions. [2021-08-06 14:32:35,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 849 transitions. [2021-08-06 14:32:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:35,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:35,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:35,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-06 14:32:35,653 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash 77364555, now seen corresponding path program 32 times [2021-08-06 14:32:35,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:35,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16600913] [2021-08-06 14:32:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:35,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:35,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:35,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16600913] [2021-08-06 14:32:35,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16600913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:35,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434663886] [2021-08-06 14:32:35,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:35,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:35,741 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:35,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:32:36,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:32:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:36,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434663886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:36,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:36,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:32:36,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541165397] [2021-08-06 14:32:36,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:32:36,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:36,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:32:36,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:36,415 INFO L87 Difference]: Start difference. First operand 275 states and 849 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:36,574 INFO L93 Difference]: Finished difference Result 566 states and 1635 transitions. [2021-08-06 14:32:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:36,575 INFO L225 Difference]: With dead ends: 566 [2021-08-06 14:32:36,575 INFO L226 Difference]: Without dead ends: 566 [2021-08-06 14:32:36,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:32:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-06 14:32:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 278. [2021-08-06 14:32:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.11913357400722) internal successors, (864), 277 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 864 transitions. [2021-08-06 14:32:36,580 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 864 transitions. Word has length 18 [2021-08-06 14:32:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:36,580 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 864 transitions. [2021-08-06 14:32:36,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 864 transitions. [2021-08-06 14:32:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:36,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:36,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:36,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:36,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:36,781 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:36,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1071740175, now seen corresponding path program 33 times [2021-08-06 14:32:36,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:36,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406816922] [2021-08-06 14:32:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:36,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:36,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:36,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406816922] [2021-08-06 14:32:36,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406816922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:36,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:36,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:36,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730402726] [2021-08-06 14:32:36,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:36,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:36,870 INFO L87 Difference]: Start difference. First operand 278 states and 864 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:37,019 INFO L93 Difference]: Finished difference Result 535 states and 1568 transitions. [2021-08-06 14:32:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:37,022 INFO L225 Difference]: With dead ends: 535 [2021-08-06 14:32:37,022 INFO L226 Difference]: Without dead ends: 535 [2021-08-06 14:32:37,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-06 14:32:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 275. [2021-08-06 14:32:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0985401459854014) internal successors, (849), 274 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 849 transitions. [2021-08-06 14:32:37,028 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 849 transitions. Word has length 18 [2021-08-06 14:32:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:37,029 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 849 transitions. [2021-08-06 14:32:37,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 849 transitions. [2021-08-06 14:32:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:37,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:37,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:37,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-06 14:32:37,030 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2052193307, now seen corresponding path program 34 times [2021-08-06 14:32:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:37,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609724535] [2021-08-06 14:32:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:37,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:37,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609724535] [2021-08-06 14:32:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609724535] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:37,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:37,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:37,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663280281] [2021-08-06 14:32:37,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:37,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:37,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:37,114 INFO L87 Difference]: Start difference. First operand 275 states and 849 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:37,227 INFO L93 Difference]: Finished difference Result 489 states and 1415 transitions. [2021-08-06 14:32:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:37,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:37,229 INFO L225 Difference]: With dead ends: 489 [2021-08-06 14:32:37,229 INFO L226 Difference]: Without dead ends: 483 [2021-08-06 14:32:37,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-06 14:32:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 279. [2021-08-06 14:32:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.1043165467625897) internal successors, (863), 278 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 863 transitions. [2021-08-06 14:32:37,234 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 863 transitions. Word has length 18 [2021-08-06 14:32:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:37,235 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 863 transitions. [2021-08-06 14:32:37,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 863 transitions. [2021-08-06 14:32:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:37,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:37,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:37,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-06 14:32:37,236 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2076093221, now seen corresponding path program 35 times [2021-08-06 14:32:37,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:37,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268516840] [2021-08-06 14:32:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:37,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:37,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:37,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268516840] [2021-08-06 14:32:37,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268516840] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:37,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:37,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:37,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037528318] [2021-08-06 14:32:37,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:37,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:37,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:37,318 INFO L87 Difference]: Start difference. First operand 279 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:37,431 INFO L93 Difference]: Finished difference Result 472 states and 1397 transitions. [2021-08-06 14:32:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:37,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:37,433 INFO L225 Difference]: With dead ends: 472 [2021-08-06 14:32:37,433 INFO L226 Difference]: Without dead ends: 472 [2021-08-06 14:32:37,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-06 14:32:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 274. [2021-08-06 14:32:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.0842490842490844) internal successors, (842), 273 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 842 transitions. [2021-08-06 14:32:37,437 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 842 transitions. Word has length 18 [2021-08-06 14:32:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:37,437 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 842 transitions. [2021-08-06 14:32:37,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 842 transitions. [2021-08-06 14:32:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:37,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:37,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:37,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-06 14:32:37,438 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash 836442943, now seen corresponding path program 36 times [2021-08-06 14:32:37,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:37,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962672657] [2021-08-06 14:32:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:37,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:37,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:37,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962672657] [2021-08-06 14:32:37,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962672657] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:37,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:37,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:32:37,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935851985] [2021-08-06 14:32:37,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:32:37,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:32:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:32:37,521 INFO L87 Difference]: Start difference. First operand 274 states and 842 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:37,626 INFO L93 Difference]: Finished difference Result 468 states and 1370 transitions. [2021-08-06 14:32:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:37,627 INFO L225 Difference]: With dead ends: 468 [2021-08-06 14:32:37,627 INFO L226 Difference]: Without dead ends: 468 [2021-08-06 14:32:37,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-06 14:32:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 273. [2021-08-06 14:32:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0808823529411766) internal successors, (838), 272 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 838 transitions. [2021-08-06 14:32:37,633 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 838 transitions. Word has length 18 [2021-08-06 14:32:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:37,633 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 838 transitions. [2021-08-06 14:32:37,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 838 transitions. [2021-08-06 14:32:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:37,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:37,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:37,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-06 14:32:37,634 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2047601403, now seen corresponding path program 37 times [2021-08-06 14:32:37,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:37,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503073272] [2021-08-06 14:32:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:37,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:37,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:37,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503073272] [2021-08-06 14:32:37,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503073272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:37,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077594698] [2021-08-06 14:32:37,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:37,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:37,706 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:37,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:32:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:38,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:38,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077594698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:38,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:38,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:32:38,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019753759] [2021-08-06 14:32:38,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:32:38,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:38,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:32:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:38,359 INFO L87 Difference]: Start difference. First operand 273 states and 838 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-08-06 14:32:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:38,479 INFO L93 Difference]: Finished difference Result 472 states and 1362 transitions. [2021-08-06 14:32:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:38,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 18 [2021-08-06 14:32:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:38,480 INFO L225 Difference]: With dead ends: 472 [2021-08-06 14:32:38,480 INFO L226 Difference]: Without dead ends: 472 [2021-08-06 14:32:38,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-06 14:32:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 272. [2021-08-06 14:32:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.07380073800738) internal successors, (833), 271 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 833 transitions. [2021-08-06 14:32:38,484 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 833 transitions. Word has length 18 [2021-08-06 14:32:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:38,485 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 833 transitions. [2021-08-06 14:32:38,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-08-06 14:32:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 833 transitions. [2021-08-06 14:32:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:38,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:38,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:38,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:38,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:38,686 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash -973211039, now seen corresponding path program 38 times [2021-08-06 14:32:38,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:38,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001953009] [2021-08-06 14:32:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:38,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:38,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:38,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001953009] [2021-08-06 14:32:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001953009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:38,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196427394] [2021-08-06 14:32:38,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:38,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:38,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:38,773 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:38,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:32:39,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:32:39,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:39,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196427394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:39,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:39,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:32:39,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800984503] [2021-08-06 14:32:39,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:32:39,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:32:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:39,413 INFO L87 Difference]: Start difference. First operand 272 states and 833 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:39,531 INFO L93 Difference]: Finished difference Result 429 states and 1265 transitions. [2021-08-06 14:32:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 18 [2021-08-06 14:32:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:39,532 INFO L225 Difference]: With dead ends: 429 [2021-08-06 14:32:39,532 INFO L226 Difference]: Without dead ends: 429 [2021-08-06 14:32:39,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:32:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-06 14:32:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 255. [2021-08-06 14:32:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0393700787401574) internal successors, (772), 254 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) [2021-08-06 14:32:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 772 transitions. [2021-08-06 14:32:39,536 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 772 transitions. Word has length 18 [2021-08-06 14:32:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:39,536 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 772 transitions. [2021-08-06 14:32:39,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 772 transitions. [2021-08-06 14:32:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:39,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:39,537 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:39,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:39,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:39,753 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:39,753 INFO L82 PathProgramCache]: Analyzing trace with hash 191422761, now seen corresponding path program 39 times [2021-08-06 14:32:39,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:39,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702068603] [2021-08-06 14:32:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:39,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:39,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:39,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702068603] [2021-08-06 14:32:39,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702068603] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:39,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:39,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:39,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594398721] [2021-08-06 14:32:39,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:39,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:39,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:39,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:39,824 INFO L87 Difference]: Start difference. First operand 255 states and 772 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:39,931 INFO L93 Difference]: Finished difference Result 443 states and 1280 transitions. [2021-08-06 14:32:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:39,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:39,933 INFO L225 Difference]: With dead ends: 443 [2021-08-06 14:32:39,933 INFO L226 Difference]: Without dead ends: 443 [2021-08-06 14:32:39,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-06 14:32:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-08-06 14:32:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.0730769230769233) internal successors, (799), 260 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 799 transitions. [2021-08-06 14:32:39,938 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 799 transitions. Word has length 18 [2021-08-06 14:32:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:39,939 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 799 transitions. [2021-08-06 14:32:39,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 799 transitions. [2021-08-06 14:32:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:39,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:39,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:39,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-08-06 14:32:39,940 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1465577615, now seen corresponding path program 40 times [2021-08-06 14:32:39,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:39,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829275901] [2021-08-06 14:32:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:39,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829275901] [2021-08-06 14:32:40,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829275901] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:40,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:40,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:40,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81224891] [2021-08-06 14:32:40,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:40,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:40,006 INFO L87 Difference]: Start difference. First operand 261 states and 799 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:40,124 INFO L93 Difference]: Finished difference Result 449 states and 1295 transitions. [2021-08-06 14:32:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:40,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:40,125 INFO L225 Difference]: With dead ends: 449 [2021-08-06 14:32:40,125 INFO L226 Difference]: Without dead ends: 449 [2021-08-06 14:32:40,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-06 14:32:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 258. [2021-08-06 14:32:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.0505836575875485) internal successors, (784), 257 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) [2021-08-06 14:32:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 784 transitions. [2021-08-06 14:32:40,130 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 784 transitions. Word has length 18 [2021-08-06 14:32:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:40,130 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 784 transitions. [2021-08-06 14:32:40,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 784 transitions. [2021-08-06 14:32:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:40,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:40,130 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:40,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-08-06 14:32:40,130 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:40,131 INFO L82 PathProgramCache]: Analyzing trace with hash 395118011, now seen corresponding path program 41 times [2021-08-06 14:32:40,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:40,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610757368] [2021-08-06 14:32:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:40,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610757368] [2021-08-06 14:32:40,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610757368] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:40,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:40,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:40,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990767732] [2021-08-06 14:32:40,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:40,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:40,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:40,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:40,187 INFO L87 Difference]: Start difference. First operand 258 states and 784 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:40,291 INFO L93 Difference]: Finished difference Result 407 states and 1188 transitions. [2021-08-06 14:32:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:40,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:40,292 INFO L225 Difference]: With dead ends: 407 [2021-08-06 14:32:40,292 INFO L226 Difference]: Without dead ends: 407 [2021-08-06 14:32:40,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-06 14:32:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 264. [2021-08-06 14:32:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.038022813688213) internal successors, (799), 263 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 799 transitions. [2021-08-06 14:32:40,296 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 799 transitions. Word has length 18 [2021-08-06 14:32:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:40,296 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 799 transitions. [2021-08-06 14:32:40,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 799 transitions. [2021-08-06 14:32:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:40,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:40,297 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:40,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-08-06 14:32:40,297 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1113307943, now seen corresponding path program 17 times [2021-08-06 14:32:40,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:40,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827994247] [2021-08-06 14:32:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:40,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827994247] [2021-08-06 14:32:40,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827994247] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:40,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:40,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:40,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571194460] [2021-08-06 14:32:40,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:40,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:40,347 INFO L87 Difference]: Start difference. First operand 264 states and 799 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:40,423 INFO L93 Difference]: Finished difference Result 401 states and 1136 transitions. [2021-08-06 14:32:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:40,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:40,424 INFO L225 Difference]: With dead ends: 401 [2021-08-06 14:32:40,424 INFO L226 Difference]: Without dead ends: 383 [2021-08-06 14:32:40,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-06 14:32:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 268. [2021-08-06 14:32:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0299625468164795) internal successors, (809), 267 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) [2021-08-06 14:32:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 809 transitions. [2021-08-06 14:32:40,429 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 809 transitions. Word has length 18 [2021-08-06 14:32:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:40,430 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 809 transitions. [2021-08-06 14:32:40,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 809 transitions. [2021-08-06 14:32:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:40,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:40,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:40,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-06 14:32:40,431 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:40,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1391576833, now seen corresponding path program 18 times [2021-08-06 14:32:40,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:40,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429118201] [2021-08-06 14:32:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:40,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429118201] [2021-08-06 14:32:40,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429118201] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:40,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:40,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:40,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958417156] [2021-08-06 14:32:40,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:40,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:40,490 INFO L87 Difference]: Start difference. First operand 268 states and 809 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:40,567 INFO L93 Difference]: Finished difference Result 422 states and 1178 transitions. [2021-08-06 14:32:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:40,568 INFO L225 Difference]: With dead ends: 422 [2021-08-06 14:32:40,568 INFO L226 Difference]: Without dead ends: 415 [2021-08-06 14:32:40,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-06 14:32:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 279. [2021-08-06 14:32:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.014388489208633) internal successors, (838), 278 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 838 transitions. [2021-08-06 14:32:40,572 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 838 transitions. Word has length 18 [2021-08-06 14:32:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:40,573 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 838 transitions. [2021-08-06 14:32:40,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 838 transitions. [2021-08-06 14:32:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:40,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:40,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:40,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-06 14:32:40,574 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:40,574 INFO L82 PathProgramCache]: Analyzing trace with hash -322339367, now seen corresponding path program 19 times [2021-08-06 14:32:40,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:40,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68983172] [2021-08-06 14:32:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:40,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68983172] [2021-08-06 14:32:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68983172] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:40,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:40,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:40,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699708210] [2021-08-06 14:32:40,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:40,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:40,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:40,642 INFO L87 Difference]: Start difference. First operand 279 states and 838 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:40,754 INFO L93 Difference]: Finished difference Result 391 states and 1121 transitions. [2021-08-06 14:32:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:40,755 INFO L225 Difference]: With dead ends: 391 [2021-08-06 14:32:40,755 INFO L226 Difference]: Without dead ends: 391 [2021-08-06 14:32:40,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-06 14:32:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 264. [2021-08-06 14:32:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.038022813688213) internal successors, (799), 263 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 799 transitions. [2021-08-06 14:32:40,758 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 799 transitions. Word has length 18 [2021-08-06 14:32:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:40,759 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 799 transitions. [2021-08-06 14:32:40,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 799 transitions. [2021-08-06 14:32:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:40,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:40,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:40,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-08-06 14:32:40,759 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:40,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1825606179, now seen corresponding path program 20 times [2021-08-06 14:32:40,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:40,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864529637] [2021-08-06 14:32:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:40,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864529637] [2021-08-06 14:32:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864529637] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:40,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:40,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:40,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642014500] [2021-08-06 14:32:40,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:40,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:40,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:40,822 INFO L87 Difference]: Start difference. First operand 264 states and 799 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:40,900 INFO L93 Difference]: Finished difference Result 362 states and 1047 transitions. [2021-08-06 14:32:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:40,902 INFO L225 Difference]: With dead ends: 362 [2021-08-06 14:32:40,902 INFO L226 Difference]: Without dead ends: 355 [2021-08-06 14:32:40,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-06 14:32:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 268. [2021-08-06 14:32:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0299625468164795) internal successors, (809), 267 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) [2021-08-06 14:32:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 809 transitions. [2021-08-06 14:32:40,905 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 809 transitions. Word has length 18 [2021-08-06 14:32:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:40,905 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 809 transitions. [2021-08-06 14:32:40,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 809 transitions. [2021-08-06 14:32:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:40,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:40,906 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:40,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-06 14:32:40,906 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:40,906 INFO L82 PathProgramCache]: Analyzing trace with hash -756368713, now seen corresponding path program 21 times [2021-08-06 14:32:40,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:40,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024903377] [2021-08-06 14:32:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:40,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024903377] [2021-08-06 14:32:40,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024903377] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:40,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:40,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:40,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064562771] [2021-08-06 14:32:40,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:40,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:40,974 INFO L87 Difference]: Start difference. First operand 268 states and 809 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:41,055 INFO L93 Difference]: Finished difference Result 361 states and 1052 transitions. [2021-08-06 14:32:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:41,056 INFO L225 Difference]: With dead ends: 361 [2021-08-06 14:32:41,056 INFO L226 Difference]: Without dead ends: 361 [2021-08-06 14:32:41,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-08-06 14:32:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 266. [2021-08-06 14:32:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0339622641509436) internal successors, (804), 265 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 804 transitions. [2021-08-06 14:32:41,060 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 804 transitions. Word has length 18 [2021-08-06 14:32:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:41,060 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 804 transitions. [2021-08-06 14:32:41,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 804 transitions. [2021-08-06 14:32:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:41,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:41,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:41,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-06 14:32:41,061 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2019559785, now seen corresponding path program 22 times [2021-08-06 14:32:41,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:41,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505459884] [2021-08-06 14:32:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:41,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:41,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:41,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505459884] [2021-08-06 14:32:41,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505459884] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:41,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:41,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:41,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704080331] [2021-08-06 14:32:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:41,126 INFO L87 Difference]: Start difference. First operand 266 states and 804 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:41,204 INFO L93 Difference]: Finished difference Result 401 states and 1146 transitions. [2021-08-06 14:32:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:41,205 INFO L225 Difference]: With dead ends: 401 [2021-08-06 14:32:41,205 INFO L226 Difference]: Without dead ends: 401 [2021-08-06 14:32:41,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-06 14:32:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 268. [2021-08-06 14:32:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0374531835205993) internal successors, (811), 267 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 811 transitions. [2021-08-06 14:32:41,209 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 811 transitions. Word has length 18 [2021-08-06 14:32:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:41,209 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 811 transitions. [2021-08-06 14:32:41,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 811 transitions. [2021-08-06 14:32:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:41,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:41,209 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:41,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-06 14:32:41,210 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1934189573, now seen corresponding path program 42 times [2021-08-06 14:32:41,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:41,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486766617] [2021-08-06 14:32:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:41,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:41,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:41,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486766617] [2021-08-06 14:32:41,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486766617] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:41,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:41,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:41,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46614851] [2021-08-06 14:32:41,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:41,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:41,332 INFO L87 Difference]: Start difference. First operand 268 states and 811 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:41,449 INFO L93 Difference]: Finished difference Result 489 states and 1427 transitions. [2021-08-06 14:32:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:41,451 INFO L225 Difference]: With dead ends: 489 [2021-08-06 14:32:41,451 INFO L226 Difference]: Without dead ends: 489 [2021-08-06 14:32:41,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-06 14:32:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 278. [2021-08-06 14:32:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.108303249097473) internal successors, (861), 277 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 861 transitions. [2021-08-06 14:32:41,458 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 861 transitions. Word has length 18 [2021-08-06 14:32:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:41,458 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 861 transitions. [2021-08-06 14:32:41,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 861 transitions. [2021-08-06 14:32:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:41,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:41,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:41,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-06 14:32:41,459 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash -651603781, now seen corresponding path program 23 times [2021-08-06 14:32:41,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:41,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163285963] [2021-08-06 14:32:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:41,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:41,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:41,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163285963] [2021-08-06 14:32:41,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163285963] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:41,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:41,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:41,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997388446] [2021-08-06 14:32:41,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:41,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:41,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:41,552 INFO L87 Difference]: Start difference. First operand 278 states and 861 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:41,669 INFO L93 Difference]: Finished difference Result 552 states and 1579 transitions. [2021-08-06 14:32:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:41,670 INFO L225 Difference]: With dead ends: 552 [2021-08-06 14:32:41,670 INFO L226 Difference]: Without dead ends: 545 [2021-08-06 14:32:41,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-06 14:32:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 290. [2021-08-06 14:32:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.1072664359861593) internal successors, (898), 289 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 898 transitions. [2021-08-06 14:32:41,675 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 898 transitions. Word has length 18 [2021-08-06 14:32:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:41,675 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 898 transitions. [2021-08-06 14:32:41,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 898 transitions. [2021-08-06 14:32:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:41,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:41,675 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:41,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-08-06 14:32:41,675 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1000660983, now seen corresponding path program 24 times [2021-08-06 14:32:41,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:41,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949073299] [2021-08-06 14:32:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:41,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:41,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:41,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949073299] [2021-08-06 14:32:41,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949073299] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:41,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:41,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:41,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528772488] [2021-08-06 14:32:41,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:41,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:41,762 INFO L87 Difference]: Start difference. First operand 290 states and 898 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:41,872 INFO L93 Difference]: Finished difference Result 561 states and 1614 transitions. [2021-08-06 14:32:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:41,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:41,873 INFO L225 Difference]: With dead ends: 561 [2021-08-06 14:32:41,873 INFO L226 Difference]: Without dead ends: 561 [2021-08-06 14:32:41,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-06 14:32:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 290. [2021-08-06 14:32:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.1072664359861593) internal successors, (898), 289 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 898 transitions. [2021-08-06 14:32:41,879 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 898 transitions. Word has length 18 [2021-08-06 14:32:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:41,879 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 898 transitions. [2021-08-06 14:32:41,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 898 transitions. [2021-08-06 14:32:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:41,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:41,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:41,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-08-06 14:32:41,879 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:41,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1478700289, now seen corresponding path program 43 times [2021-08-06 14:32:41,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:41,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941528072] [2021-08-06 14:32:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:41,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:41,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:41,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941528072] [2021-08-06 14:32:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941528072] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:41,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492868998] [2021-08-06 14:32:41,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:41,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:41,964 INFO L87 Difference]: Start difference. First operand 290 states and 898 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:42,066 INFO L93 Difference]: Finished difference Result 487 states and 1413 transitions. [2021-08-06 14:32:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:42,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:42,067 INFO L225 Difference]: With dead ends: 487 [2021-08-06 14:32:42,068 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 14:32:42,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 14:32:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 293. [2021-08-06 14:32:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0821917808219177) internal successors, (900), 292 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) [2021-08-06 14:32:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 900 transitions. [2021-08-06 14:32:42,072 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 900 transitions. Word has length 18 [2021-08-06 14:32:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:42,072 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 900 transitions. [2021-08-06 14:32:42,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 900 transitions. [2021-08-06 14:32:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:42,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:42,072 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:42,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-08-06 14:32:42,073 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1619880389, now seen corresponding path program 44 times [2021-08-06 14:32:42,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:42,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140611239] [2021-08-06 14:32:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:42,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:42,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:42,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140611239] [2021-08-06 14:32:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140611239] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:42,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:42,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:42,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656088770] [2021-08-06 14:32:42,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:42,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:42,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:42,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:42,152 INFO L87 Difference]: Start difference. First operand 293 states and 900 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:42,278 INFO L93 Difference]: Finished difference Result 558 states and 1611 transitions. [2021-08-06 14:32:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:42,279 INFO L225 Difference]: With dead ends: 558 [2021-08-06 14:32:42,279 INFO L226 Difference]: Without dead ends: 558 [2021-08-06 14:32:42,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-08-06 14:32:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 296. [2021-08-06 14:32:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1016949152542375) internal successors, (915), 295 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) [2021-08-06 14:32:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 915 transitions. [2021-08-06 14:32:42,285 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 915 transitions. Word has length 18 [2021-08-06 14:32:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:42,285 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 915 transitions. [2021-08-06 14:32:42,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 915 transitions. [2021-08-06 14:32:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:42,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:42,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:42,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-08-06 14:32:42,286 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash -625504769, now seen corresponding path program 45 times [2021-08-06 14:32:42,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:42,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067567589] [2021-08-06 14:32:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:42,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:42,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:42,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067567589] [2021-08-06 14:32:42,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067567589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:42,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:42,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:42,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226618664] [2021-08-06 14:32:42,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:42,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:42,363 INFO L87 Difference]: Start difference. First operand 296 states and 915 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:42,504 INFO L93 Difference]: Finished difference Result 527 states and 1544 transitions. [2021-08-06 14:32:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:42,506 INFO L225 Difference]: With dead ends: 527 [2021-08-06 14:32:42,506 INFO L226 Difference]: Without dead ends: 527 [2021-08-06 14:32:42,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-06 14:32:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 293. [2021-08-06 14:32:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0821917808219177) internal successors, (900), 292 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) [2021-08-06 14:32:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 900 transitions. [2021-08-06 14:32:42,510 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 900 transitions. Word has length 18 [2021-08-06 14:32:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:42,510 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 900 transitions. [2021-08-06 14:32:42,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 900 transitions. [2021-08-06 14:32:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:42,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:42,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:42,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-08-06 14:32:42,511 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:42,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2025830735, now seen corresponding path program 25 times [2021-08-06 14:32:42,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:42,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236446038] [2021-08-06 14:32:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:42,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:42,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:42,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236446038] [2021-08-06 14:32:42,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236446038] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:42,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:42,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:42,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761083763] [2021-08-06 14:32:42,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:42,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:42,600 INFO L87 Difference]: Start difference. First operand 293 states and 900 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:42,710 INFO L93 Difference]: Finished difference Result 593 states and 1666 transitions. [2021-08-06 14:32:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:42,711 INFO L225 Difference]: With dead ends: 593 [2021-08-06 14:32:42,711 INFO L226 Difference]: Without dead ends: 586 [2021-08-06 14:32:42,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-06 14:32:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 297. [2021-08-06 14:32:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.0878378378378377) internal successors, (914), 296 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 914 transitions. [2021-08-06 14:32:42,716 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 914 transitions. Word has length 18 [2021-08-06 14:32:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 914 transitions. [2021-08-06 14:32:42,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 914 transitions. [2021-08-06 14:32:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:42,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:42,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:42,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-08-06 14:32:42,716 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 334412023, now seen corresponding path program 26 times [2021-08-06 14:32:42,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:42,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143807703] [2021-08-06 14:32:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:42,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:42,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:42,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143807703] [2021-08-06 14:32:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143807703] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:42,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:42,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:42,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052494405] [2021-08-06 14:32:42,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:42,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:42,814 INFO L87 Difference]: Start difference. First operand 297 states and 914 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:42,980 INFO L93 Difference]: Finished difference Result 498 states and 1420 transitions. [2021-08-06 14:32:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:32:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:42,981 INFO L225 Difference]: With dead ends: 498 [2021-08-06 14:32:42,981 INFO L226 Difference]: Without dead ends: 498 [2021-08-06 14:32:42,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-06 14:32:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 295. [2021-08-06 14:32:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-08-06 14:32:42,985 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-08-06 14:32:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:42,985 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-08-06 14:32:42,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-08-06 14:32:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:42,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:42,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:42,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-06 14:32:42,986 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:42,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1103549513, now seen corresponding path program 27 times [2021-08-06 14:32:42,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:42,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910697731] [2021-08-06 14:32:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:42,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:43,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:43,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910697731] [2021-08-06 14:32:43,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910697731] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:43,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:43,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:43,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247298094] [2021-08-06 14:32:43,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:43,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:43,076 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:43,210 INFO L93 Difference]: Finished difference Result 529 states and 1512 transitions. [2021-08-06 14:32:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:43,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:43,211 INFO L225 Difference]: With dead ends: 529 [2021-08-06 14:32:43,211 INFO L226 Difference]: Without dead ends: 529 [2021-08-06 14:32:43,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-06 14:32:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 298. [2021-08-06 14:32:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.111111111111111) internal successors, (924), 297 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) [2021-08-06 14:32:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-08-06 14:32:43,216 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-08-06 14:32:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:43,216 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-08-06 14:32:43,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-08-06 14:32:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:43,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:43,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:43,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-06 14:32:43,217 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -324443997, now seen corresponding path program 28 times [2021-08-06 14:32:43,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:43,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466479617] [2021-08-06 14:32:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:43,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:43,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:43,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466479617] [2021-08-06 14:32:43,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466479617] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:43,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:43,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:43,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136327365] [2021-08-06 14:32:43,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:43,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:43,313 INFO L87 Difference]: Start difference. First operand 298 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:43,438 INFO L93 Difference]: Finished difference Result 484 states and 1407 transitions. [2021-08-06 14:32:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:43,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:43,439 INFO L225 Difference]: With dead ends: 484 [2021-08-06 14:32:43,439 INFO L226 Difference]: Without dead ends: 484 [2021-08-06 14:32:43,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-06 14:32:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 295. [2021-08-06 14:32:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-08-06 14:32:43,443 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-08-06 14:32:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:43,443 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-08-06 14:32:43,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-08-06 14:32:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:43,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:43,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:43,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-08-06 14:32:43,444 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash 354948363, now seen corresponding path program 46 times [2021-08-06 14:32:43,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:43,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952733975] [2021-08-06 14:32:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:43,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:43,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952733975] [2021-08-06 14:32:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952733975] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:43,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:43,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:43,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845738209] [2021-08-06 14:32:43,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:43,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:43,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:43,518 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:43,653 INFO L93 Difference]: Finished difference Result 526 states and 1501 transitions. [2021-08-06 14:32:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:43,655 INFO L225 Difference]: With dead ends: 526 [2021-08-06 14:32:43,655 INFO L226 Difference]: Without dead ends: 520 [2021-08-06 14:32:43,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-06 14:32:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 299. [2021-08-06 14:32:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.097315436241611) internal successors, (923), 298 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) [2021-08-06 14:32:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 923 transitions. [2021-08-06 14:32:43,661 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 923 transitions. Word has length 18 [2021-08-06 14:32:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:43,661 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 923 transitions. [2021-08-06 14:32:43,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 923 transitions. [2021-08-06 14:32:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:43,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:43,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:43,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-08-06 14:32:43,662 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash 378848277, now seen corresponding path program 47 times [2021-08-06 14:32:43,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:43,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693693047] [2021-08-06 14:32:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:43,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:43,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:43,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693693047] [2021-08-06 14:32:43,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693693047] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:43,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:43,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:43,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534621613] [2021-08-06 14:32:43,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:43,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:43,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:43,746 INFO L87 Difference]: Start difference. First operand 299 states and 923 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:43,936 INFO L93 Difference]: Finished difference Result 509 states and 1483 transitions. [2021-08-06 14:32:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:43,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:43,937 INFO L225 Difference]: With dead ends: 509 [2021-08-06 14:32:43,937 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 14:32:43,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 14:32:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 296. [2021-08-06 14:32:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.0915254237288137) internal successors, (912), 295 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) [2021-08-06 14:32:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 912 transitions. [2021-08-06 14:32:43,942 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 912 transitions. Word has length 18 [2021-08-06 14:32:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:43,942 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 912 transitions. [2021-08-06 14:32:43,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 912 transitions. [2021-08-06 14:32:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:43,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:43,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:43,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-08-06 14:32:43,943 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 562658277, now seen corresponding path program 48 times [2021-08-06 14:32:43,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:43,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92134869] [2021-08-06 14:32:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:43,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:44,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:44,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92134869] [2021-08-06 14:32:44,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92134869] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:44,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:44,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:44,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126717651] [2021-08-06 14:32:44,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:44,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:44,021 INFO L87 Difference]: Start difference. First operand 296 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:44,136 INFO L93 Difference]: Finished difference Result 522 states and 1539 transitions. [2021-08-06 14:32:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:44,137 INFO L225 Difference]: With dead ends: 522 [2021-08-06 14:32:44,138 INFO L226 Difference]: Without dead ends: 522 [2021-08-06 14:32:44,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-06 14:32:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 297. [2021-08-06 14:32:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.0878378378378377) internal successors, (914), 296 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 914 transitions. [2021-08-06 14:32:44,142 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 914 transitions. Word has length 18 [2021-08-06 14:32:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:44,142 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 914 transitions. [2021-08-06 14:32:44,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 914 transitions. [2021-08-06 14:32:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:44,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:44,143 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:44,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-08-06 14:32:44,143 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1557033897, now seen corresponding path program 49 times [2021-08-06 14:32:44,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:44,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715897188] [2021-08-06 14:32:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:44,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:44,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715897188] [2021-08-06 14:32:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715897188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219976013] [2021-08-06 14:32:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:44,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:44,212 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:44,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:32:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:44,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:44,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219976013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:44,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:44,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:32:44,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004756971] [2021-08-06 14:32:44,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:32:44,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:44,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:32:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:44,877 INFO L87 Difference]: Start difference. First operand 297 states and 914 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:45,044 INFO L93 Difference]: Finished difference Result 516 states and 1521 transitions. [2021-08-06 14:32:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:45,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 18 [2021-08-06 14:32:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:45,046 INFO L225 Difference]: With dead ends: 516 [2021-08-06 14:32:45,046 INFO L226 Difference]: Without dead ends: 516 [2021-08-06 14:32:45,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:32:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-06 14:32:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 286. [2021-08-06 14:32:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.07719298245614) internal successors, (877), 285 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 877 transitions. [2021-08-06 14:32:45,050 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 877 transitions. Word has length 18 [2021-08-06 14:32:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:45,050 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 877 transitions. [2021-08-06 14:32:45,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 877 transitions. [2021-08-06 14:32:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:45,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:45,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:45,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:45,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:45,252 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:45,252 INFO L82 PathProgramCache]: Analyzing trace with hash 839713783, now seen corresponding path program 50 times [2021-08-06 14:32:45,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:45,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377909072] [2021-08-06 14:32:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:45,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:45,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:45,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377909072] [2021-08-06 14:32:45,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377909072] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:45,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:45,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:45,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916204157] [2021-08-06 14:32:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:45,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:45,329 INFO L87 Difference]: Start difference. First operand 286 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:45,462 INFO L93 Difference]: Finished difference Result 512 states and 1495 transitions. [2021-08-06 14:32:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:45,463 INFO L225 Difference]: With dead ends: 512 [2021-08-06 14:32:45,463 INFO L226 Difference]: Without dead ends: 512 [2021-08-06 14:32:45,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-06 14:32:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 283. [2021-08-06 14:32:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.0673758865248226) internal successors, (865), 282 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 865 transitions. [2021-08-06 14:32:45,467 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 865 transitions. Word has length 18 [2021-08-06 14:32:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:45,467 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 865 transitions. [2021-08-06 14:32:45,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 865 transitions. [2021-08-06 14:32:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:45,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:45,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:45,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-06 14:32:45,468 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash -509083621, now seen corresponding path program 29 times [2021-08-06 14:32:45,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:45,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034232645] [2021-08-06 14:32:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:45,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:45,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:45,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034232645] [2021-08-06 14:32:45,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034232645] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:45,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:45,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:45,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128999442] [2021-08-06 14:32:45,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:45,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:45,531 INFO L87 Difference]: Start difference. First operand 283 states and 865 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:45,637 INFO L93 Difference]: Finished difference Result 544 states and 1538 transitions. [2021-08-06 14:32:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:45,638 INFO L225 Difference]: With dead ends: 544 [2021-08-06 14:32:45,638 INFO L226 Difference]: Without dead ends: 537 [2021-08-06 14:32:45,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-06 14:32:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 289. [2021-08-06 14:32:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.0625) internal successors, (882), 288 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 882 transitions. [2021-08-06 14:32:45,643 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 882 transitions. Word has length 18 [2021-08-06 14:32:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:45,643 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 882 transitions. [2021-08-06 14:32:45,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 882 transitions. [2021-08-06 14:32:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:45,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:45,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:45,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-08-06 14:32:45,644 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2094464963, now seen corresponding path program 30 times [2021-08-06 14:32:45,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:45,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970254925] [2021-08-06 14:32:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:45,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:45,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:45,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970254925] [2021-08-06 14:32:45,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970254925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:45,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:45,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:45,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728117098] [2021-08-06 14:32:45,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:45,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:45,723 INFO L87 Difference]: Start difference. First operand 289 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:45,860 INFO L93 Difference]: Finished difference Result 495 states and 1406 transitions. [2021-08-06 14:32:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:32:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:45,861 INFO L225 Difference]: With dead ends: 495 [2021-08-06 14:32:45,861 INFO L226 Difference]: Without dead ends: 495 [2021-08-06 14:32:45,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:32:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-06 14:32:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 287. [2021-08-06 14:32:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0664335664335662) internal successors, (877), 286 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 877 transitions. [2021-08-06 14:32:45,865 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 877 transitions. Word has length 18 [2021-08-06 14:32:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:45,865 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 877 transitions. [2021-08-06 14:32:45,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 877 transitions. [2021-08-06 14:32:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:45,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:45,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:45,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-08-06 14:32:45,866 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1172762823, now seen corresponding path program 31 times [2021-08-06 14:32:45,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:45,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620865383] [2021-08-06 14:32:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:45,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:45,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:45,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620865383] [2021-08-06 14:32:45,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620865383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:45,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:45,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:45,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381880835] [2021-08-06 14:32:45,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:45,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:45,945 INFO L87 Difference]: Start difference. First operand 287 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:46,084 INFO L93 Difference]: Finished difference Result 498 states and 1414 transitions. [2021-08-06 14:32:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:32:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:46,085 INFO L225 Difference]: With dead ends: 498 [2021-08-06 14:32:46,085 INFO L226 Difference]: Without dead ends: 498 [2021-08-06 14:32:46,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-06 14:32:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 285. [2021-08-06 14:32:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0704225352112675) internal successors, (872), 284 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 872 transitions. [2021-08-06 14:32:46,091 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 872 transitions. Word has length 18 [2021-08-06 14:32:46,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:46,091 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 872 transitions. [2021-08-06 14:32:46,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,091 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 872 transitions. [2021-08-06 14:32:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:46,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:46,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:46,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-06 14:32:46,092 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:46,092 INFO L82 PathProgramCache]: Analyzing trace with hash -610953751, now seen corresponding path program 32 times [2021-08-06 14:32:46,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:46,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656874124] [2021-08-06 14:32:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:46,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:46,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:46,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656874124] [2021-08-06 14:32:46,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656874124] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:46,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:46,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:46,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118196034] [2021-08-06 14:32:46,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:46,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:46,175 INFO L87 Difference]: Start difference. First operand 285 states and 872 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:46,303 INFO L93 Difference]: Finished difference Result 506 states and 1454 transitions. [2021-08-06 14:32:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:46,304 INFO L225 Difference]: With dead ends: 506 [2021-08-06 14:32:46,305 INFO L226 Difference]: Without dead ends: 506 [2021-08-06 14:32:46,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-06 14:32:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 286. [2021-08-06 14:32:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.066666666666667) internal successors, (874), 285 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 874 transitions. [2021-08-06 14:32:46,311 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 874 transitions. Word has length 18 [2021-08-06 14:32:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:46,311 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 874 transitions. [2021-08-06 14:32:46,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 874 transitions. [2021-08-06 14:32:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:46,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:46,312 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:46,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-06 14:32:46,312 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:46,313 INFO L82 PathProgramCache]: Analyzing trace with hash 168151765, now seen corresponding path program 33 times [2021-08-06 14:32:46,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:46,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674082521] [2021-08-06 14:32:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:46,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:46,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:46,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674082521] [2021-08-06 14:32:46,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674082521] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:46,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:46,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:46,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3067608] [2021-08-06 14:32:46,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:46,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:46,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:46,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:46,403 INFO L87 Difference]: Start difference. First operand 286 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:46,537 INFO L93 Difference]: Finished difference Result 503 states and 1445 transitions. [2021-08-06 14:32:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:46,538 INFO L225 Difference]: With dead ends: 503 [2021-08-06 14:32:46,538 INFO L226 Difference]: Without dead ends: 503 [2021-08-06 14:32:46,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-06 14:32:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 283. [2021-08-06 14:32:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.0460992907801416) internal successors, (859), 282 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 859 transitions. [2021-08-06 14:32:46,542 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 859 transitions. Word has length 18 [2021-08-06 14:32:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:46,542 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 859 transitions. [2021-08-06 14:32:46,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 859 transitions. [2021-08-06 14:32:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:46,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:46,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:46,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-08-06 14:32:46,543 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1160545655, now seen corresponding path program 34 times [2021-08-06 14:32:46,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:46,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903094934] [2021-08-06 14:32:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:46,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:46,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:46,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903094934] [2021-08-06 14:32:46,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903094934] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:46,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:46,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:46,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449651457] [2021-08-06 14:32:46,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:46,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:46,612 INFO L87 Difference]: Start difference. First operand 283 states and 859 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:46,735 INFO L93 Difference]: Finished difference Result 491 states and 1413 transitions. [2021-08-06 14:32:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:46,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:46,736 INFO L225 Difference]: With dead ends: 491 [2021-08-06 14:32:46,736 INFO L226 Difference]: Without dead ends: 491 [2021-08-06 14:32:46,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-06 14:32:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 272. [2021-08-06 14:32:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.055350553505535) internal successors, (828), 271 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 828 transitions. [2021-08-06 14:32:46,740 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 828 transitions. Word has length 18 [2021-08-06 14:32:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:46,740 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 828 transitions. [2021-08-06 14:32:46,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 828 transitions. [2021-08-06 14:32:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:46,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:46,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:46,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-08-06 14:32:46,741 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:46,741 INFO L82 PathProgramCache]: Analyzing trace with hash 425058399, now seen corresponding path program 51 times [2021-08-06 14:32:46,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:46,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207917307] [2021-08-06 14:32:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:46,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:46,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:46,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207917307] [2021-08-06 14:32:46,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207917307] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:46,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:46,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:46,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412773286] [2021-08-06 14:32:46,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:46,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:46,804 INFO L87 Difference]: Start difference. First operand 272 states and 828 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:46,926 INFO L93 Difference]: Finished difference Result 410 states and 1189 transitions. [2021-08-06 14:32:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:46,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:46,927 INFO L225 Difference]: With dead ends: 410 [2021-08-06 14:32:46,927 INFO L226 Difference]: Without dead ends: 404 [2021-08-06 14:32:46,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-06 14:32:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 286. [2021-08-06 14:32:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.042105263157895) internal successors, (867), 285 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 867 transitions. [2021-08-06 14:32:46,931 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 867 transitions. Word has length 18 [2021-08-06 14:32:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:46,931 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 867 transitions. [2021-08-06 14:32:46,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 867 transitions. [2021-08-06 14:32:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:46,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:46,932 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:46,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-06 14:32:46,932 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash 448958313, now seen corresponding path program 52 times [2021-08-06 14:32:46,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:46,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497441331] [2021-08-06 14:32:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:46,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:47,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:47,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497441331] [2021-08-06 14:32:47,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497441331] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:47,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:47,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:47,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655513484] [2021-08-06 14:32:47,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:47,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:47,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:47,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:47,004 INFO L87 Difference]: Start difference. First operand 286 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:47,145 INFO L93 Difference]: Finished difference Result 416 states and 1210 transitions. [2021-08-06 14:32:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:47,146 INFO L225 Difference]: With dead ends: 416 [2021-08-06 14:32:47,146 INFO L226 Difference]: Without dead ends: 416 [2021-08-06 14:32:47,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-06 14:32:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 284. [2021-08-06 14:32:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.045936395759717) internal successors, (862), 283 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 862 transitions. [2021-08-06 14:32:47,150 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 862 transitions. Word has length 18 [2021-08-06 14:32:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:47,150 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 862 transitions. [2021-08-06 14:32:47,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 862 transitions. [2021-08-06 14:32:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:47,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:47,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:47,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-06 14:32:47,150 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:47,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1489194111, now seen corresponding path program 53 times [2021-08-06 14:32:47,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:47,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979592750] [2021-08-06 14:32:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:47,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:47,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:47,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979592750] [2021-08-06 14:32:47,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979592750] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:47,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:47,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:47,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972345505] [2021-08-06 14:32:47,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:47,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:47,209 INFO L87 Difference]: Start difference. First operand 284 states and 862 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:47,330 INFO L93 Difference]: Finished difference Result 420 states and 1226 transitions. [2021-08-06 14:32:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:47,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:47,331 INFO L225 Difference]: With dead ends: 420 [2021-08-06 14:32:47,331 INFO L226 Difference]: Without dead ends: 420 [2021-08-06 14:32:47,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-06 14:32:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 274. [2021-08-06 14:32:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.051282051282051) internal successors, (833), 273 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 833 transitions. [2021-08-06 14:32:47,334 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 833 transitions. Word has length 18 [2021-08-06 14:32:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:47,335 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 833 transitions. [2021-08-06 14:32:47,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,335 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 833 transitions. [2021-08-06 14:32:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:47,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:47,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:47,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-08-06 14:32:47,335 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:47,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1930344541, now seen corresponding path program 35 times [2021-08-06 14:32:47,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:47,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099489044] [2021-08-06 14:32:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:47,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:47,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:47,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099489044] [2021-08-06 14:32:47,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099489044] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:47,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:47,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:47,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243179347] [2021-08-06 14:32:47,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:47,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:47,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:47,416 INFO L87 Difference]: Start difference. First operand 274 states and 833 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:47,529 INFO L93 Difference]: Finished difference Result 405 states and 1206 transitions. [2021-08-06 14:32:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:32:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:47,530 INFO L225 Difference]: With dead ends: 405 [2021-08-06 14:32:47,530 INFO L226 Difference]: Without dead ends: 398 [2021-08-06 14:32:47,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-06 14:32:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 277. [2021-08-06 14:32:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0471014492753623) internal successors, (841), 276 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) [2021-08-06 14:32:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 841 transitions. [2021-08-06 14:32:47,534 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 841 transitions. Word has length 18 [2021-08-06 14:32:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:47,534 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 841 transitions. [2021-08-06 14:32:47,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 841 transitions. [2021-08-06 14:32:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:47,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:47,535 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:47,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-08-06 14:32:47,535 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2015565553, now seen corresponding path program 36 times [2021-08-06 14:32:47,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:47,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881929298] [2021-08-06 14:32:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:47,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:47,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:47,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881929298] [2021-08-06 14:32:47,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881929298] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:47,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:47,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:47,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114613528] [2021-08-06 14:32:47,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:47,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:47,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:47,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:47,611 INFO L87 Difference]: Start difference. First operand 277 states and 841 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:47,728 INFO L93 Difference]: Finished difference Result 407 states and 1219 transitions. [2021-08-06 14:32:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:47,729 INFO L225 Difference]: With dead ends: 407 [2021-08-06 14:32:47,730 INFO L226 Difference]: Without dead ends: 407 [2021-08-06 14:32:47,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-06 14:32:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 274. [2021-08-06 14:32:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.051282051282051) internal successors, (833), 273 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 833 transitions. [2021-08-06 14:32:47,734 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 833 transitions. Word has length 18 [2021-08-06 14:32:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:47,734 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 833 transitions. [2021-08-06 14:32:47,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 833 transitions. [2021-08-06 14:32:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:47,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:47,735 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:47,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-08-06 14:32:47,735 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1480335751, now seen corresponding path program 37 times [2021-08-06 14:32:47,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:47,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846158667] [2021-08-06 14:32:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:47,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:47,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:47,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846158667] [2021-08-06 14:32:47,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846158667] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:47,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:47,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:47,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197080891] [2021-08-06 14:32:47,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:47,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:47,814 INFO L87 Difference]: Start difference. First operand 274 states and 833 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:47,923 INFO L93 Difference]: Finished difference Result 443 states and 1310 transitions. [2021-08-06 14:32:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:47,924 INFO L225 Difference]: With dead ends: 443 [2021-08-06 14:32:47,924 INFO L226 Difference]: Without dead ends: 443 [2021-08-06 14:32:47,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-06 14:32:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 271. [2021-08-06 14:32:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0555555555555554) internal successors, (825), 270 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 825 transitions. [2021-08-06 14:32:47,929 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 825 transitions. Word has length 18 [2021-08-06 14:32:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:47,930 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 825 transitions. [2021-08-06 14:32:47,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 825 transitions. [2021-08-06 14:32:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:47,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:47,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:47,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-08-06 14:32:47,930 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2049648107, now seen corresponding path program 54 times [2021-08-06 14:32:47,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:47,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899377824] [2021-08-06 14:32:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:47,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:48,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:48,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899377824] [2021-08-06 14:32:48,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899377824] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:48,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:48,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:48,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789497848] [2021-08-06 14:32:48,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:48,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:48,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:48,010 INFO L87 Difference]: Start difference. First operand 271 states and 825 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:48,113 INFO L93 Difference]: Finished difference Result 537 states and 1547 transitions. [2021-08-06 14:32:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:48,115 INFO L225 Difference]: With dead ends: 537 [2021-08-06 14:32:48,115 INFO L226 Difference]: Without dead ends: 537 [2021-08-06 14:32:48,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-06 14:32:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 279. [2021-08-06 14:32:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.1115107913669067) internal successors, (865), 278 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 865 transitions. [2021-08-06 14:32:48,119 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 865 transitions. Word has length 18 [2021-08-06 14:32:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:48,119 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 865 transitions. [2021-08-06 14:32:48,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 865 transitions. [2021-08-06 14:32:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:48,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:48,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:48,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-08-06 14:32:48,120 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash -340474165, now seen corresponding path program 38 times [2021-08-06 14:32:48,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:48,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617716017] [2021-08-06 14:32:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:48,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:48,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:48,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617716017] [2021-08-06 14:32:48,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617716017] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:48,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:48,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:48,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729942202] [2021-08-06 14:32:48,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:48,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:48,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:48,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:48,187 INFO L87 Difference]: Start difference. First operand 279 states and 865 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:48,290 INFO L93 Difference]: Finished difference Result 529 states and 1531 transitions. [2021-08-06 14:32:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:48,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:48,291 INFO L225 Difference]: With dead ends: 529 [2021-08-06 14:32:48,291 INFO L226 Difference]: Without dead ends: 522 [2021-08-06 14:32:48,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-06 14:32:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 291. [2021-08-06 14:32:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.110344827586207) internal successors, (902), 290 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 902 transitions. [2021-08-06 14:32:48,297 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 902 transitions. Word has length 18 [2021-08-06 14:32:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 902 transitions. [2021-08-06 14:32:48,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 902 transitions. [2021-08-06 14:32:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:48,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:48,298 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-08-06 14:32:48,299 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash -689531367, now seen corresponding path program 39 times [2021-08-06 14:32:48,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:48,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079419765] [2021-08-06 14:32:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:48,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:48,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:48,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079419765] [2021-08-06 14:32:48,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079419765] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:48,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:48,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:48,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159924603] [2021-08-06 14:32:48,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:48,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:48,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:48,393 INFO L87 Difference]: Start difference. First operand 291 states and 902 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:48,549 INFO L93 Difference]: Finished difference Result 521 states and 1512 transitions. [2021-08-06 14:32:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:32:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:48,550 INFO L225 Difference]: With dead ends: 521 [2021-08-06 14:32:48,550 INFO L226 Difference]: Without dead ends: 521 [2021-08-06 14:32:48,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-06 14:32:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 291. [2021-08-06 14:32:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.110344827586207) internal successors, (902), 290 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 902 transitions. [2021-08-06 14:32:48,554 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 902 transitions. Word has length 18 [2021-08-06 14:32:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:48,555 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 902 transitions. [2021-08-06 14:32:48,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 902 transitions. [2021-08-06 14:32:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:48,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:48,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:48,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-08-06 14:32:48,555 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:48,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1167570673, now seen corresponding path program 55 times [2021-08-06 14:32:48,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:48,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950843642] [2021-08-06 14:32:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:48,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:48,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:48,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950843642] [2021-08-06 14:32:48,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950843642] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:48,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:48,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:48,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134417218] [2021-08-06 14:32:48,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:48,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:48,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:48,634 INFO L87 Difference]: Start difference. First operand 291 states and 902 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:48,767 INFO L93 Difference]: Finished difference Result 548 states and 1570 transitions. [2021-08-06 14:32:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:48,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:48,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:48,768 INFO L225 Difference]: With dead ends: 548 [2021-08-06 14:32:48,768 INFO L226 Difference]: Without dead ends: 542 [2021-08-06 14:32:48,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-08-06 14:32:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 294. [2021-08-06 14:32:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.0853242320819114) internal successors, (904), 293 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 904 transitions. [2021-08-06 14:32:48,772 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 904 transitions. Word has length 18 [2021-08-06 14:32:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:48,772 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 904 transitions. [2021-08-06 14:32:48,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 904 transitions. [2021-08-06 14:32:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:48,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:48,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:48,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-08-06 14:32:48,773 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1308750773, now seen corresponding path program 56 times [2021-08-06 14:32:48,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:48,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129033794] [2021-08-06 14:32:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:48,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:48,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:48,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129033794] [2021-08-06 14:32:48,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129033794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:48,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:48,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:48,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712658444] [2021-08-06 14:32:48,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:48,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:48,861 INFO L87 Difference]: Start difference. First operand 294 states and 904 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:48,974 INFO L93 Difference]: Finished difference Result 546 states and 1563 transitions. [2021-08-06 14:32:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:48,975 INFO L225 Difference]: With dead ends: 546 [2021-08-06 14:32:48,975 INFO L226 Difference]: Without dead ends: 546 [2021-08-06 14:32:48,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-06 14:32:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 287. [2021-08-06 14:32:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.097902097902098) internal successors, (886), 286 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 886 transitions. [2021-08-06 14:32:48,979 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 886 transitions. Word has length 18 [2021-08-06 14:32:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:48,979 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 886 transitions. [2021-08-06 14:32:48,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 886 transitions. [2021-08-06 14:32:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:48,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:48,980 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:48,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-08-06 14:32:48,980 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:48,980 INFO L82 PathProgramCache]: Analyzing trace with hash -314375153, now seen corresponding path program 57 times [2021-08-06 14:32:48,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:48,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290495004] [2021-08-06 14:32:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:48,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:49,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:49,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290495004] [2021-08-06 14:32:49,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290495004] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:49,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:49,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:49,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592285043] [2021-08-06 14:32:49,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:49,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:49,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:49,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:49,062 INFO L87 Difference]: Start difference. First operand 287 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:49,188 INFO L93 Difference]: Finished difference Result 509 states and 1481 transitions. [2021-08-06 14:32:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:49,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:49,189 INFO L225 Difference]: With dead ends: 509 [2021-08-06 14:32:49,189 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 14:32:49,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 14:32:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 284. [2021-08-06 14:32:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.07773851590106) internal successors, (871), 283 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-08-06 14:32:49,193 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-08-06 14:32:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:49,193 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-08-06 14:32:49,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-08-06 14:32:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:49,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:49,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:49,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-08-06 14:32:49,194 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1958006945, now seen corresponding path program 40 times [2021-08-06 14:32:49,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:49,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413820069] [2021-08-06 14:32:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:49,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:49,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:49,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413820069] [2021-08-06 14:32:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413820069] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:49,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:49,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:49,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945038468] [2021-08-06 14:32:49,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:49,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:49,261 INFO L87 Difference]: Start difference. First operand 284 states and 871 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:49,362 INFO L93 Difference]: Finished difference Result 486 states and 1417 transitions. [2021-08-06 14:32:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:49,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:49,364 INFO L225 Difference]: With dead ends: 486 [2021-08-06 14:32:49,364 INFO L226 Difference]: Without dead ends: 479 [2021-08-06 14:32:49,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-06 14:32:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 288. [2021-08-06 14:32:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.083623693379791) internal successors, (885), 287 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 885 transitions. [2021-08-06 14:32:49,368 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 885 transitions. Word has length 18 [2021-08-06 14:32:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:49,368 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 885 transitions. [2021-08-06 14:32:49,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 885 transitions. [2021-08-06 14:32:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:49,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:49,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:49,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-08-06 14:32:49,368 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash 645541639, now seen corresponding path program 41 times [2021-08-06 14:32:49,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:49,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269984451] [2021-08-06 14:32:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:49,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:49,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269984451] [2021-08-06 14:32:49,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269984451] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:49,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:49,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:49,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376791738] [2021-08-06 14:32:49,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:49,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:49,467 INFO L87 Difference]: Start difference. First operand 288 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:49,580 INFO L93 Difference]: Finished difference Result 509 states and 1477 transitions. [2021-08-06 14:32:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:49,581 INFO L225 Difference]: With dead ends: 509 [2021-08-06 14:32:49,581 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 14:32:49,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 14:32:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 286. [2021-08-06 14:32:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.087719298245614) internal successors, (880), 285 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-08-06 14:32:49,586 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-08-06 14:32:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:49,586 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-08-06 14:32:49,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-08-06 14:32:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:49,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:49,586 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:49,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-08-06 14:32:49,586 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash -792419897, now seen corresponding path program 42 times [2021-08-06 14:32:49,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:49,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381300745] [2021-08-06 14:32:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:49,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:49,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:49,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381300745] [2021-08-06 14:32:49,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381300745] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:49,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:49,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:49,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520215956] [2021-08-06 14:32:49,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:49,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:49,685 INFO L87 Difference]: Start difference. First operand 286 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:49,800 INFO L93 Difference]: Finished difference Result 517 states and 1501 transitions. [2021-08-06 14:32:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:49,801 INFO L225 Difference]: With dead ends: 517 [2021-08-06 14:32:49,801 INFO L226 Difference]: Without dead ends: 517 [2021-08-06 14:32:49,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-06 14:32:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 289. [2021-08-06 14:32:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.107638888888889) internal successors, (895), 288 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 895 transitions. [2021-08-06 14:32:49,806 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 895 transitions. Word has length 18 [2021-08-06 14:32:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:49,806 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 895 transitions. [2021-08-06 14:32:49,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 895 transitions. [2021-08-06 14:32:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:49,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:49,806 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:49,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-08-06 14:32:49,806 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:49,807 INFO L82 PathProgramCache]: Analyzing trace with hash -13314381, now seen corresponding path program 43 times [2021-08-06 14:32:49,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:49,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401985589] [2021-08-06 14:32:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:49,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:49,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:49,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401985589] [2021-08-06 14:32:49,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401985589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:49,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:49,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:49,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517567626] [2021-08-06 14:32:49,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:49,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:49,892 INFO L87 Difference]: Start difference. First operand 289 states and 895 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:50,024 INFO L93 Difference]: Finished difference Result 484 states and 1430 transitions. [2021-08-06 14:32:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:50,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:50,025 INFO L225 Difference]: With dead ends: 484 [2021-08-06 14:32:50,025 INFO L226 Difference]: Without dead ends: 484 [2021-08-06 14:32:50,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-06 14:32:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 286. [2021-08-06 14:32:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.087719298245614) internal successors, (880), 285 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-08-06 14:32:50,029 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-08-06 14:32:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:50,029 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-08-06 14:32:50,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-08-06 14:32:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:50,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:50,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:50,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-08-06 14:32:50,029 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 666077979, now seen corresponding path program 58 times [2021-08-06 14:32:50,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:50,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711826524] [2021-08-06 14:32:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:50,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:50,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:50,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711826524] [2021-08-06 14:32:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711826524] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:50,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:50,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:50,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501139054] [2021-08-06 14:32:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:50,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:50,103 INFO L87 Difference]: Start difference. First operand 286 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:50,259 INFO L93 Difference]: Finished difference Result 541 states and 1547 transitions. [2021-08-06 14:32:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:50,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:50,260 INFO L225 Difference]: With dead ends: 541 [2021-08-06 14:32:50,260 INFO L226 Difference]: Without dead ends: 535 [2021-08-06 14:32:50,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-06 14:32:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 296. [2021-08-06 14:32:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.074576271186441) internal successors, (907), 295 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) [2021-08-06 14:32:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 907 transitions. [2021-08-06 14:32:50,264 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 907 transitions. Word has length 18 [2021-08-06 14:32:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:50,264 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 907 transitions. [2021-08-06 14:32:50,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 907 transitions. [2021-08-06 14:32:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:50,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:50,265 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:50,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-08-06 14:32:50,265 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash 689977893, now seen corresponding path program 59 times [2021-08-06 14:32:50,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:50,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831132270] [2021-08-06 14:32:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:50,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:50,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:50,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831132270] [2021-08-06 14:32:50,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831132270] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:50,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:50,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:50,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400290104] [2021-08-06 14:32:50,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:50,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:50,344 INFO L87 Difference]: Start difference. First operand 296 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:50,492 INFO L93 Difference]: Finished difference Result 518 states and 1508 transitions. [2021-08-06 14:32:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:50,493 INFO L225 Difference]: With dead ends: 518 [2021-08-06 14:32:50,493 INFO L226 Difference]: Without dead ends: 518 [2021-08-06 14:32:50,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-06 14:32:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 285. [2021-08-06 14:32:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0774647887323945) internal successors, (874), 284 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-06 14:32:50,497 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-06 14:32:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:50,497 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-06 14:32:50,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-06 14:32:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:50,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:50,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:50,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-08-06 14:32:50,498 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:50,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1709208679, now seen corresponding path program 44 times [2021-08-06 14:32:50,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:50,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063135855] [2021-08-06 14:32:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:50,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:50,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:50,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063135855] [2021-08-06 14:32:50,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063135855] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:50,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:50,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:50,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203095283] [2021-08-06 14:32:50,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:50,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:50,570 INFO L87 Difference]: Start difference. First operand 285 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:50,674 INFO L93 Difference]: Finished difference Result 587 states and 1716 transitions. [2021-08-06 14:32:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:50,675 INFO L225 Difference]: With dead ends: 587 [2021-08-06 14:32:50,675 INFO L226 Difference]: Without dead ends: 587 [2021-08-06 14:32:50,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-06 14:32:50,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 288. [2021-08-06 14:32:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.087108013937282) internal successors, (886), 287 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 886 transitions. [2021-08-06 14:32:50,680 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 886 transitions. Word has length 18 [2021-08-06 14:32:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:50,680 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 886 transitions. [2021-08-06 14:32:50,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 886 transitions. [2021-08-06 14:32:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:50,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:50,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:50,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-08-06 14:32:50,681 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1390118769, now seen corresponding path program 45 times [2021-08-06 14:32:50,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:50,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485056378] [2021-08-06 14:32:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:50,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:50,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:50,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485056378] [2021-08-06 14:32:50,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485056378] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:50,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:50,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:50,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667413111] [2021-08-06 14:32:50,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:50,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:50,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:50,769 INFO L87 Difference]: Start difference. First operand 288 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:50,903 INFO L93 Difference]: Finished difference Result 565 states and 1644 transitions. [2021-08-06 14:32:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:50,905 INFO L225 Difference]: With dead ends: 565 [2021-08-06 14:32:50,905 INFO L226 Difference]: Without dead ends: 565 [2021-08-06 14:32:50,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-06 14:32:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 291. [2021-08-06 14:32:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.106896551724138) internal successors, (901), 290 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 901 transitions. [2021-08-06 14:32:50,911 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 901 transitions. Word has length 18 [2021-08-06 14:32:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:50,911 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 901 transitions. [2021-08-06 14:32:50,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 901 transitions. [2021-08-06 14:32:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:50,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:50,912 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:50,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-08-06 14:32:50,912 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:50,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2125743011, now seen corresponding path program 46 times [2021-08-06 14:32:50,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:50,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719932008] [2021-08-06 14:32:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:50,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:50,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:50,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719932008] [2021-08-06 14:32:50,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719932008] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:50,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:50,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:50,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301294537] [2021-08-06 14:32:50,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:50,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:50,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:50,994 INFO L87 Difference]: Start difference. First operand 291 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:51,133 INFO L93 Difference]: Finished difference Result 532 states and 1573 transitions. [2021-08-06 14:32:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:51,135 INFO L225 Difference]: With dead ends: 532 [2021-08-06 14:32:51,135 INFO L226 Difference]: Without dead ends: 532 [2021-08-06 14:32:51,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-06 14:32:51,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 285. [2021-08-06 14:32:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0774647887323945) internal successors, (874), 284 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-06 14:32:51,140 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-06 14:32:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:51,141 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-06 14:32:51,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-06 14:32:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:51,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:51,141 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:51,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-08-06 14:32:51,141 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:51,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1868836377, now seen corresponding path program 60 times [2021-08-06 14:32:51,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:51,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536740102] [2021-08-06 14:32:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:51,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:51,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:51,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536740102] [2021-08-06 14:32:51,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536740102] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:51,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:51,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:51,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098963344] [2021-08-06 14:32:51,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:51,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:51,218 INFO L87 Difference]: Start difference. First operand 285 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:51,379 INFO L93 Difference]: Finished difference Result 526 states and 1497 transitions. [2021-08-06 14:32:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:51,380 INFO L225 Difference]: With dead ends: 526 [2021-08-06 14:32:51,380 INFO L226 Difference]: Without dead ends: 520 [2021-08-06 14:32:51,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-06 14:32:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 297. [2021-08-06 14:32:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.060810810810811) internal successors, (906), 296 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 906 transitions. [2021-08-06 14:32:51,384 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 906 transitions. Word has length 18 [2021-08-06 14:32:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:51,384 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 906 transitions. [2021-08-06 14:32:51,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 906 transitions. [2021-08-06 14:32:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:51,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:51,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:51,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-08-06 14:32:51,385 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1844936463, now seen corresponding path program 61 times [2021-08-06 14:32:51,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:51,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447615286] [2021-08-06 14:32:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:51,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:51,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:51,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447615286] [2021-08-06 14:32:51,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447615286] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:51,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:51,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:51,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75798152] [2021-08-06 14:32:51,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:51,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:51,457 INFO L87 Difference]: Start difference. First operand 297 states and 906 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:51,598 INFO L93 Difference]: Finished difference Result 497 states and 1443 transitions. [2021-08-06 14:32:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:51,599 INFO L225 Difference]: With dead ends: 497 [2021-08-06 14:32:51,599 INFO L226 Difference]: Without dead ends: 497 [2021-08-06 14:32:51,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-06 14:32:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 284. [2021-08-06 14:32:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.070671378091873) internal successors, (869), 283 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 869 transitions. [2021-08-06 14:32:51,609 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 869 transitions. Word has length 18 [2021-08-06 14:32:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:51,610 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 869 transitions. [2021-08-06 14:32:51,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 869 transitions. [2021-08-06 14:32:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:51,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:51,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:51,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-08-06 14:32:51,610 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:51,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1396696717, now seen corresponding path program 62 times [2021-08-06 14:32:51,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:51,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123928463] [2021-08-06 14:32:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:51,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:51,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:51,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123928463] [2021-08-06 14:32:51,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123928463] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:51,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:51,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:51,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227834748] [2021-08-06 14:32:51,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:51,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:51,694 INFO L87 Difference]: Start difference. First operand 284 states and 869 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:51,792 INFO L93 Difference]: Finished difference Result 534 states and 1549 transitions. [2021-08-06 14:32:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:51,793 INFO L225 Difference]: With dead ends: 534 [2021-08-06 14:32:51,793 INFO L226 Difference]: Without dead ends: 534 [2021-08-06 14:32:51,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-06 14:32:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 293. [2021-08-06 14:32:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.1301369863013697) internal successors, (914), 292 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 914 transitions. [2021-08-06 14:32:51,797 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 914 transitions. Word has length 18 [2021-08-06 14:32:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:51,797 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 914 transitions. [2021-08-06 14:32:51,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 914 transitions. [2021-08-06 14:32:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:51,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:51,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:51,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-08-06 14:32:51,798 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1189096637, now seen corresponding path program 47 times [2021-08-06 14:32:51,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:51,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714275872] [2021-08-06 14:32:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:51,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:51,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:51,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714275872] [2021-08-06 14:32:51,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714275872] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:51,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:51,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:51,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627337487] [2021-08-06 14:32:51,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:51,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:51,870 INFO L87 Difference]: Start difference. First operand 293 states and 914 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:51,976 INFO L93 Difference]: Finished difference Result 475 states and 1393 transitions. [2021-08-06 14:32:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:51,977 INFO L225 Difference]: With dead ends: 475 [2021-08-06 14:32:51,977 INFO L226 Difference]: Without dead ends: 468 [2021-08-06 14:32:51,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-06 14:32:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 295. [2021-08-06 14:32:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1360544217687076) internal successors, (922), 294 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 922 transitions. [2021-08-06 14:32:51,981 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 922 transitions. Word has length 18 [2021-08-06 14:32:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:51,981 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 922 transitions. [2021-08-06 14:32:51,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 922 transitions. [2021-08-06 14:32:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:51,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:51,982 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:51,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-08-06 14:32:51,982 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1538153839, now seen corresponding path program 48 times [2021-08-06 14:32:51,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:51,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721204888] [2021-08-06 14:32:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:51,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:52,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:52,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721204888] [2021-08-06 14:32:52,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721204888] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:52,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:52,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:52,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028971374] [2021-08-06 14:32:52,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:52,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:52,077 INFO L87 Difference]: Start difference. First operand 295 states and 922 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:52,191 INFO L93 Difference]: Finished difference Result 450 states and 1320 transitions. [2021-08-06 14:32:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:52,192 INFO L225 Difference]: With dead ends: 450 [2021-08-06 14:32:52,192 INFO L226 Difference]: Without dead ends: 450 [2021-08-06 14:32:52,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-06 14:32:52,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-08-06 14:32:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1360544217687076) internal successors, (922), 294 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 922 transitions. [2021-08-06 14:32:52,196 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 922 transitions. Word has length 18 [2021-08-06 14:32:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:52,196 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 922 transitions. [2021-08-06 14:32:52,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 922 transitions. [2021-08-06 14:32:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:52,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:52,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:52,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-08-06 14:32:52,197 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:52,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2016193145, now seen corresponding path program 63 times [2021-08-06 14:32:52,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:52,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313290068] [2021-08-06 14:32:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:52,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:52,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:52,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313290068] [2021-08-06 14:32:52,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313290068] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:52,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:52,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:52,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101643540] [2021-08-06 14:32:52,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:52,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:52,268 INFO L87 Difference]: Start difference. First operand 295 states and 922 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:52,400 INFO L93 Difference]: Finished difference Result 535 states and 1543 transitions. [2021-08-06 14:32:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:52,401 INFO L225 Difference]: With dead ends: 535 [2021-08-06 14:32:52,401 INFO L226 Difference]: Without dead ends: 529 [2021-08-06 14:32:52,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-06 14:32:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 298. [2021-08-06 14:32:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.111111111111111) internal successors, (924), 297 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) [2021-08-06 14:32:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-08-06 14:32:52,405 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-08-06 14:32:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:52,405 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-08-06 14:32:52,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-08-06 14:32:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:52,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:52,406 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:52,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-08-06 14:32:52,406 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2137594051, now seen corresponding path program 64 times [2021-08-06 14:32:52,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:52,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261707838] [2021-08-06 14:32:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:52,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:52,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:52,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261707838] [2021-08-06 14:32:52,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261707838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:52,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:52,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:52,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194058025] [2021-08-06 14:32:52,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:52,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:52,507 INFO L87 Difference]: Start difference. First operand 298 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:52,625 INFO L93 Difference]: Finished difference Result 594 states and 1700 transitions. [2021-08-06 14:32:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:52,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:52,626 INFO L225 Difference]: With dead ends: 594 [2021-08-06 14:32:52,626 INFO L226 Difference]: Without dead ends: 594 [2021-08-06 14:32:52,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-06 14:32:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 301. [2021-08-06 14:32:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.13) internal successors, (939), 300 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) [2021-08-06 14:32:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 939 transitions. [2021-08-06 14:32:52,631 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 939 transitions. Word has length 18 [2021-08-06 14:32:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:52,631 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 939 transitions. [2021-08-06 14:32:52,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 939 transitions. [2021-08-06 14:32:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:52,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:52,632 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:52,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-08-06 14:32:52,632 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:52,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1162997625, now seen corresponding path program 65 times [2021-08-06 14:32:52,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:52,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123875696] [2021-08-06 14:32:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:52,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:52,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:52,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123875696] [2021-08-06 14:32:52,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123875696] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:52,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:52,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:52,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972015216] [2021-08-06 14:32:52,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:52,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:52,708 INFO L87 Difference]: Start difference. First operand 301 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:52,852 INFO L93 Difference]: Finished difference Result 557 states and 1618 transitions. [2021-08-06 14:32:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:52,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:52,853 INFO L225 Difference]: With dead ends: 557 [2021-08-06 14:32:52,853 INFO L226 Difference]: Without dead ends: 557 [2021-08-06 14:32:52,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-06 14:32:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 298. [2021-08-06 14:32:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.111111111111111) internal successors, (924), 297 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) [2021-08-06 14:32:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-08-06 14:32:52,858 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-08-06 14:32:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-08-06 14:32:52,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-08-06 14:32:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:52,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:52,858 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:52,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-08-06 14:32:52,859 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:52,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1488337879, now seen corresponding path program 49 times [2021-08-06 14:32:52,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:52,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843583066] [2021-08-06 14:32:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:52,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:52,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:52,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843583066] [2021-08-06 14:32:52,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843583066] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:52,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:52,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:52,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866233057] [2021-08-06 14:32:52,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:52,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:52,946 INFO L87 Difference]: Start difference. First operand 298 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:53,049 INFO L93 Difference]: Finished difference Result 516 states and 1480 transitions. [2021-08-06 14:32:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:53,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:53,050 INFO L225 Difference]: With dead ends: 516 [2021-08-06 14:32:53,051 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 14:32:53,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 14:32:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 299. [2021-08-06 14:32:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.097315436241611) internal successors, (923), 298 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) [2021-08-06 14:32:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 923 transitions. [2021-08-06 14:32:53,055 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 923 transitions. Word has length 18 [2021-08-06 14:32:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:53,055 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 923 transitions. [2021-08-06 14:32:53,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 923 transitions. [2021-08-06 14:32:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:53,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:53,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-08-06 14:32:53,056 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:53,056 INFO L82 PathProgramCache]: Analyzing trace with hash -203080833, now seen corresponding path program 50 times [2021-08-06 14:32:53,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:53,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030861028] [2021-08-06 14:32:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:53,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:53,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:53,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030861028] [2021-08-06 14:32:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030861028] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:53,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:53,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:53,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688621298] [2021-08-06 14:32:53,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:53,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:53,144 INFO L87 Difference]: Start difference. First operand 299 states and 923 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:53,281 INFO L93 Difference]: Finished difference Result 566 states and 1578 transitions. [2021-08-06 14:32:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:32:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:53,283 INFO L225 Difference]: With dead ends: 566 [2021-08-06 14:32:53,283 INFO L226 Difference]: Without dead ends: 566 [2021-08-06 14:32:53,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-06 14:32:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 297. [2021-08-06 14:32:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.1013513513513513) internal successors, (918), 296 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) [2021-08-06 14:32:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 918 transitions. [2021-08-06 14:32:53,287 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 918 transitions. Word has length 18 [2021-08-06 14:32:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:53,287 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 918 transitions. [2021-08-06 14:32:53,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 918 transitions. [2021-08-06 14:32:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:53,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:53,288 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:53,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-08-06 14:32:53,288 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1641042369, now seen corresponding path program 51 times [2021-08-06 14:32:53,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:53,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144713834] [2021-08-06 14:32:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:53,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:53,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:53,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144713834] [2021-08-06 14:32:53,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144713834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:53,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:53,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:53,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466977430] [2021-08-06 14:32:53,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:53,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:53,389 INFO L87 Difference]: Start difference. First operand 297 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:53,505 INFO L93 Difference]: Finished difference Result 512 states and 1469 transitions. [2021-08-06 14:32:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:53,506 INFO L225 Difference]: With dead ends: 512 [2021-08-06 14:32:53,506 INFO L226 Difference]: Without dead ends: 512 [2021-08-06 14:32:53,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-06 14:32:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 300. [2021-08-06 14:32:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.120401337792642) internal successors, (933), 299 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) [2021-08-06 14:32:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 933 transitions. [2021-08-06 14:32:53,511 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 933 transitions. Word has length 18 [2021-08-06 14:32:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:53,511 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 933 transitions. [2021-08-06 14:32:53,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 933 transitions. [2021-08-06 14:32:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:53,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:53,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:53,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-08-06 14:32:53,511 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash -861936853, now seen corresponding path program 52 times [2021-08-06 14:32:53,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:53,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477663829] [2021-08-06 14:32:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:53,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:53,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:53,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477663829] [2021-08-06 14:32:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477663829] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:53,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:53,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:53,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227601769] [2021-08-06 14:32:53,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:53,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:53,599 INFO L87 Difference]: Start difference. First operand 300 states and 933 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:53,725 INFO L93 Difference]: Finished difference Result 546 states and 1550 transitions. [2021-08-06 14:32:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:53,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:53,726 INFO L225 Difference]: With dead ends: 546 [2021-08-06 14:32:53,726 INFO L226 Difference]: Without dead ends: 546 [2021-08-06 14:32:53,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-06 14:32:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 297. [2021-08-06 14:32:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.1013513513513513) internal successors, (918), 296 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) [2021-08-06 14:32:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 918 transitions. [2021-08-06 14:32:53,731 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 918 transitions. Word has length 18 [2021-08-06 14:32:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:53,731 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 918 transitions. [2021-08-06 14:32:53,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 918 transitions. [2021-08-06 14:32:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:53,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:53,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:53,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-08-06 14:32:53,731 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:53,731 INFO L82 PathProgramCache]: Analyzing trace with hash -182544493, now seen corresponding path program 66 times [2021-08-06 14:32:53,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:53,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428718619] [2021-08-06 14:32:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:53,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:53,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:53,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428718619] [2021-08-06 14:32:53,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428718619] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:53,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:53,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:53,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450848118] [2021-08-06 14:32:53,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:53,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:53,814 INFO L87 Difference]: Start difference. First operand 297 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:53,959 INFO L93 Difference]: Finished difference Result 576 states and 1636 transitions. [2021-08-06 14:32:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:53,960 INFO L225 Difference]: With dead ends: 576 [2021-08-06 14:32:53,961 INFO L226 Difference]: Without dead ends: 570 [2021-08-06 14:32:53,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-06 14:32:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 301. [2021-08-06 14:32:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.1066666666666665) internal successors, (932), 300 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 932 transitions. [2021-08-06 14:32:53,965 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 932 transitions. Word has length 18 [2021-08-06 14:32:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:53,965 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 932 transitions. [2021-08-06 14:32:53,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 932 transitions. [2021-08-06 14:32:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:53,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:53,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:53,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-08-06 14:32:53,966 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:53,966 INFO L82 PathProgramCache]: Analyzing trace with hash -158644579, now seen corresponding path program 67 times [2021-08-06 14:32:53,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:53,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740217797] [2021-08-06 14:32:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:53,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:54,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:54,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740217797] [2021-08-06 14:32:54,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740217797] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:54,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:54,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:54,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402882821] [2021-08-06 14:32:54,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:54,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:54,041 INFO L87 Difference]: Start difference. First operand 301 states and 932 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:54,201 INFO L93 Difference]: Finished difference Result 559 states and 1618 transitions. [2021-08-06 14:32:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:54,202 INFO L225 Difference]: With dead ends: 559 [2021-08-06 14:32:54,202 INFO L226 Difference]: Without dead ends: 559 [2021-08-06 14:32:54,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-06 14:32:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 298. [2021-08-06 14:32:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.101010101010101) internal successors, (921), 297 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) [2021-08-06 14:32:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 921 transitions. [2021-08-06 14:32:54,207 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 921 transitions. Word has length 18 [2021-08-06 14:32:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:54,207 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 921 transitions. [2021-08-06 14:32:54,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 921 transitions. [2021-08-06 14:32:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:54,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:54,207 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:54,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-08-06 14:32:54,208 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash 25165421, now seen corresponding path program 68 times [2021-08-06 14:32:54,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:54,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506768958] [2021-08-06 14:32:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:54,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:54,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:54,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506768958] [2021-08-06 14:32:54,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506768958] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:54,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:54,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:54,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746233432] [2021-08-06 14:32:54,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:54,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:54,295 INFO L87 Difference]: Start difference. First operand 298 states and 921 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:54,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:54,412 INFO L93 Difference]: Finished difference Result 515 states and 1504 transitions. [2021-08-06 14:32:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:54,413 INFO L225 Difference]: With dead ends: 515 [2021-08-06 14:32:54,413 INFO L226 Difference]: Without dead ends: 515 [2021-08-06 14:32:54,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-06 14:32:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 299. [2021-08-06 14:32:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.097315436241611) internal successors, (923), 298 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) [2021-08-06 14:32:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 923 transitions. [2021-08-06 14:32:54,417 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 923 transitions. Word has length 18 [2021-08-06 14:32:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:54,417 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 923 transitions. [2021-08-06 14:32:54,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 923 transitions. [2021-08-06 14:32:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:54,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:54,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:54,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-08-06 14:32:54,418 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:54,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1019541041, now seen corresponding path program 69 times [2021-08-06 14:32:54,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:54,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411572150] [2021-08-06 14:32:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:54,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:54,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:54,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411572150] [2021-08-06 14:32:54,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411572150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:54,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591709908] [2021-08-06 14:32:54,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:54,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:54,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:54,493 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:54,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:32:54,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:32:54,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:54,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:32:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:55,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591709908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:55,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:55,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:32:55,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379957134] [2021-08-06 14:32:55,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:32:55,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:55,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:32:55,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:55,224 INFO L87 Difference]: Start difference. First operand 299 states and 923 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:55,469 INFO L93 Difference]: Finished difference Result 503 states and 1471 transitions. [2021-08-06 14:32:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:55,471 INFO L225 Difference]: With dead ends: 503 [2021-08-06 14:32:55,471 INFO L226 Difference]: Without dead ends: 503 [2021-08-06 14:32:55,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-06 14:32:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 288. [2021-08-06 14:32:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.087108013937282) internal successors, (886), 287 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 886 transitions. [2021-08-06 14:32:55,475 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 886 transitions. Word has length 18 [2021-08-06 14:32:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:55,475 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 886 transitions. [2021-08-06 14:32:55,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 886 transitions. [2021-08-06 14:32:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:55,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:55,476 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:55,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 14:32:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:55,676 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash 302220927, now seen corresponding path program 70 times [2021-08-06 14:32:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:55,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376114303] [2021-08-06 14:32:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:55,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:55,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:55,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376114303] [2021-08-06 14:32:55,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376114303] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:55,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:55,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:55,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168636100] [2021-08-06 14:32:55,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:55,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:55,742 INFO L87 Difference]: Start difference. First operand 288 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:55,853 INFO L93 Difference]: Finished difference Result 493 states and 1430 transitions. [2021-08-06 14:32:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:55,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:55,854 INFO L225 Difference]: With dead ends: 493 [2021-08-06 14:32:55,854 INFO L226 Difference]: Without dead ends: 493 [2021-08-06 14:32:55,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-06 14:32:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 285. [2021-08-06 14:32:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0774647887323945) internal successors, (874), 284 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-06 14:32:55,858 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-06 14:32:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:55,858 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-06 14:32:55,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-06 14:32:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:55,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:55,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:55,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-08-06 14:32:55,859 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1046576477, now seen corresponding path program 53 times [2021-08-06 14:32:55,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:55,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312790901] [2021-08-06 14:32:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:55,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:55,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:55,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312790901] [2021-08-06 14:32:55,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312790901] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:55,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:55,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:55,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883755661] [2021-08-06 14:32:55,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:55,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:55,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:55,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:55,916 INFO L87 Difference]: Start difference. First operand 285 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:55,998 INFO L93 Difference]: Finished difference Result 415 states and 1217 transitions. [2021-08-06 14:32:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:55,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:55,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:55,999 INFO L225 Difference]: With dead ends: 415 [2021-08-06 14:32:55,999 INFO L226 Difference]: Without dead ends: 408 [2021-08-06 14:32:55,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-06 14:32:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 289. [2021-08-06 14:32:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.076388888888889) internal successors, (886), 288 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 886 transitions. [2021-08-06 14:32:56,003 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 886 transitions. Word has length 18 [2021-08-06 14:32:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:56,003 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 886 transitions. [2021-08-06 14:32:56,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 886 transitions. [2021-08-06 14:32:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:56,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:56,003 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:56,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-08-06 14:32:56,003 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1556972107, now seen corresponding path program 54 times [2021-08-06 14:32:56,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:56,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620173833] [2021-08-06 14:32:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:56,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:56,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:56,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620173833] [2021-08-06 14:32:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620173833] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:56,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:56,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:56,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174753650] [2021-08-06 14:32:56,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:56,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:56,078 INFO L87 Difference]: Start difference. First operand 289 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:56,193 INFO L93 Difference]: Finished difference Result 427 states and 1242 transitions. [2021-08-06 14:32:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:56,194 INFO L225 Difference]: With dead ends: 427 [2021-08-06 14:32:56,194 INFO L226 Difference]: Without dead ends: 427 [2021-08-06 14:32:56,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-06 14:32:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 287. [2021-08-06 14:32:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0804195804195804) internal successors, (881), 286 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 881 transitions. [2021-08-06 14:32:56,197 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 881 transitions. Word has length 18 [2021-08-06 14:32:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:56,197 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 881 transitions. [2021-08-06 14:32:56,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 881 transitions. [2021-08-06 14:32:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:56,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:56,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:56,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-08-06 14:32:56,198 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash 635269967, now seen corresponding path program 55 times [2021-08-06 14:32:56,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:56,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301515948] [2021-08-06 14:32:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:56,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:56,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:56,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301515948] [2021-08-06 14:32:56,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301515948] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:56,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:56,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:56,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355517958] [2021-08-06 14:32:56,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:56,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:56,264 INFO L87 Difference]: Start difference. First operand 287 states and 881 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:56,363 INFO L93 Difference]: Finished difference Result 422 states and 1230 transitions. [2021-08-06 14:32:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:56,364 INFO L225 Difference]: With dead ends: 422 [2021-08-06 14:32:56,364 INFO L226 Difference]: Without dead ends: 422 [2021-08-06 14:32:56,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-06 14:32:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 285. [2021-08-06 14:32:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.084507042253521) internal successors, (876), 284 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 876 transitions. [2021-08-06 14:32:56,368 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 876 transitions. Word has length 18 [2021-08-06 14:32:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:56,368 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 876 transitions. [2021-08-06 14:32:56,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 876 transitions. [2021-08-06 14:32:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:56,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:56,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:56,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-08-06 14:32:56,369 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1148446607, now seen corresponding path program 56 times [2021-08-06 14:32:56,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:56,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626047720] [2021-08-06 14:32:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:56,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:56,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:56,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626047720] [2021-08-06 14:32:56,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626047720] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:56,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:56,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:56,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844207070] [2021-08-06 14:32:56,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:56,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:56,474 INFO L87 Difference]: Start difference. First operand 285 states and 876 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:56,592 INFO L93 Difference]: Finished difference Result 538 states and 1541 transitions. [2021-08-06 14:32:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:56,593 INFO L225 Difference]: With dead ends: 538 [2021-08-06 14:32:56,593 INFO L226 Difference]: Without dead ends: 538 [2021-08-06 14:32:56,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-06 14:32:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 291. [2021-08-06 14:32:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.113793103448276) internal successors, (903), 290 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) [2021-08-06 14:32:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 903 transitions. [2021-08-06 14:32:56,597 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 903 transitions. Word has length 18 [2021-08-06 14:32:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:56,598 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 903 transitions. [2021-08-06 14:32:56,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 903 transitions. [2021-08-06 14:32:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:56,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:56,598 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:56,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-08-06 14:32:56,598 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash -369341091, now seen corresponding path program 57 times [2021-08-06 14:32:56,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:56,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006196525] [2021-08-06 14:32:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:56,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:56,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:56,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006196525] [2021-08-06 14:32:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006196525] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:56,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:56,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:56,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495793640] [2021-08-06 14:32:56,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:56,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:56,675 INFO L87 Difference]: Start difference. First operand 291 states and 903 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:56,800 INFO L93 Difference]: Finished difference Result 544 states and 1556 transitions. [2021-08-06 14:32:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:56,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:56,802 INFO L225 Difference]: With dead ends: 544 [2021-08-06 14:32:56,802 INFO L226 Difference]: Without dead ends: 544 [2021-08-06 14:32:56,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-06 14:32:56,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 288. [2021-08-06 14:32:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.0940766550522647) internal successors, (888), 287 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 888 transitions. [2021-08-06 14:32:56,807 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 888 transitions. Word has length 18 [2021-08-06 14:32:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:56,808 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 888 transitions. [2021-08-06 14:32:56,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 888 transitions. [2021-08-06 14:32:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:56,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:56,808 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:56,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-08-06 14:32:56,809 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1698038511, now seen corresponding path program 58 times [2021-08-06 14:32:56,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:56,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754940506] [2021-08-06 14:32:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:56,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:56,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:56,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754940506] [2021-08-06 14:32:56,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754940506] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:56,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:56,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:56,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593040926] [2021-08-06 14:32:56,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:56,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:56,880 INFO L87 Difference]: Start difference. First operand 288 states and 888 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:56,975 INFO L93 Difference]: Finished difference Result 532 states and 1524 transitions. [2021-08-06 14:32:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:56,976 INFO L225 Difference]: With dead ends: 532 [2021-08-06 14:32:56,976 INFO L226 Difference]: Without dead ends: 532 [2021-08-06 14:32:56,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:32:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-06 14:32:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 285. [2021-08-06 14:32:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.084507042253521) internal successors, (876), 284 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 876 transitions. [2021-08-06 14:32:56,980 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 876 transitions. Word has length 18 [2021-08-06 14:32:56,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:56,980 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 876 transitions. [2021-08-06 14:32:56,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 876 transitions. [2021-08-06 14:32:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:56,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:56,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:56,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-08-06 14:32:56,981 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:56,981 INFO L82 PathProgramCache]: Analyzing trace with hash -112434457, now seen corresponding path program 71 times [2021-08-06 14:32:56,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:56,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277956343] [2021-08-06 14:32:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:56,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:57,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:57,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277956343] [2021-08-06 14:32:57,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277956343] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:57,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:57,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:57,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113890440] [2021-08-06 14:32:57,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:57,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:57,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:57,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:57,056 INFO L87 Difference]: Start difference. First operand 285 states and 876 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:57,207 INFO L93 Difference]: Finished difference Result 543 states and 1541 transitions. [2021-08-06 14:32:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:57,209 INFO L225 Difference]: With dead ends: 543 [2021-08-06 14:32:57,209 INFO L226 Difference]: Without dead ends: 537 [2021-08-06 14:32:57,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-06 14:32:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 299. [2021-08-06 14:32:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0704697986577183) internal successors, (915), 298 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) [2021-08-06 14:32:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 915 transitions. [2021-08-06 14:32:57,216 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 915 transitions. Word has length 18 [2021-08-06 14:32:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:57,216 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 915 transitions. [2021-08-06 14:32:57,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 915 transitions. [2021-08-06 14:32:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:57,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:57,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:57,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-08-06 14:32:57,217 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash -88534543, now seen corresponding path program 72 times [2021-08-06 14:32:57,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:57,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494822201] [2021-08-06 14:32:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:57,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:57,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:57,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494822201] [2021-08-06 14:32:57,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494822201] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:57,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:57,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:57,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239066706] [2021-08-06 14:32:57,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:57,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:57,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:57,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:57,290 INFO L87 Difference]: Start difference. First operand 299 states and 915 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:57,457 INFO L93 Difference]: Finished difference Result 549 states and 1562 transitions. [2021-08-06 14:32:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:57,459 INFO L225 Difference]: With dead ends: 549 [2021-08-06 14:32:57,459 INFO L226 Difference]: Without dead ends: 549 [2021-08-06 14:32:57,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-08-06 14:32:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 297. [2021-08-06 14:32:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.074324324324324) internal successors, (910), 296 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 910 transitions. [2021-08-06 14:32:57,465 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 910 transitions. Word has length 18 [2021-08-06 14:32:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:57,465 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 910 transitions. [2021-08-06 14:32:57,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 910 transitions. [2021-08-06 14:32:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:57,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:57,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:57,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-08-06 14:32:57,466 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash 951701255, now seen corresponding path program 73 times [2021-08-06 14:32:57,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:57,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337962541] [2021-08-06 14:32:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:57,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:57,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:57,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337962541] [2021-08-06 14:32:57,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337962541] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:57,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:57,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:57,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563612791] [2021-08-06 14:32:57,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:57,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:57,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:57,529 INFO L87 Difference]: Start difference. First operand 297 states and 910 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:57,669 INFO L93 Difference]: Finished difference Result 553 states and 1578 transitions. [2021-08-06 14:32:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:57,670 INFO L225 Difference]: With dead ends: 553 [2021-08-06 14:32:57,670 INFO L226 Difference]: Without dead ends: 553 [2021-08-06 14:32:57,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-06 14:32:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 284. [2021-08-06 14:32:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.07773851590106) internal successors, (871), 283 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-08-06 14:32:57,674 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-08-06 14:32:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:57,674 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-08-06 14:32:57,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-08-06 14:32:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:57,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:57,675 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:57,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-08-06 14:32:57,675 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:57,675 INFO L82 PathProgramCache]: Analyzing trace with hash 676358055, now seen corresponding path program 59 times [2021-08-06 14:32:57,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:57,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75374762] [2021-08-06 14:32:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:57,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:57,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:57,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75374762] [2021-08-06 14:32:57,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75374762] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:57,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:57,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:57,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819217526] [2021-08-06 14:32:57,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:57,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:57,744 INFO L87 Difference]: Start difference. First operand 284 states and 871 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:57,841 INFO L93 Difference]: Finished difference Result 432 states and 1271 transitions. [2021-08-06 14:32:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:57,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:57,842 INFO L225 Difference]: With dead ends: 432 [2021-08-06 14:32:57,842 INFO L226 Difference]: Without dead ends: 432 [2021-08-06 14:32:57,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-06 14:32:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 286. [2021-08-06 14:32:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.0807017543859647) internal successors, (878), 285 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-08-06 14:32:57,845 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-08-06 14:32:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:57,845 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-08-06 14:32:57,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-08-06 14:32:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:57,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:57,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:57,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-08-06 14:32:57,846 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:57,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:57,846 INFO L82 PathProgramCache]: Analyzing trace with hash -519281793, now seen corresponding path program 60 times [2021-08-06 14:32:57,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:57,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691102554] [2021-08-06 14:32:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:57,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:57,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:57,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691102554] [2021-08-06 14:32:57,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691102554] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:57,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:57,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:57,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560983502] [2021-08-06 14:32:57,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:57,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:57,911 INFO L87 Difference]: Start difference. First operand 286 states and 878 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:58,025 INFO L93 Difference]: Finished difference Result 474 states and 1372 transitions. [2021-08-06 14:32:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:58,026 INFO L225 Difference]: With dead ends: 474 [2021-08-06 14:32:58,026 INFO L226 Difference]: Without dead ends: 474 [2021-08-06 14:32:58,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-06 14:32:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 289. [2021-08-06 14:32:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1006944444444446) internal successors, (893), 288 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 893 transitions. [2021-08-06 14:32:58,030 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 893 transitions. Word has length 18 [2021-08-06 14:32:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:58,030 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 893 transitions. [2021-08-06 14:32:58,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 893 transitions. [2021-08-06 14:32:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:58,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:58,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:58,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-08-06 14:32:58,031 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash 259823723, now seen corresponding path program 61 times [2021-08-06 14:32:58,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:58,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987066360] [2021-08-06 14:32:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:58,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:58,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:58,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987066360] [2021-08-06 14:32:58,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987066360] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:58,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:58,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:58,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173152612] [2021-08-06 14:32:58,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:58,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:58,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:58,105 INFO L87 Difference]: Start difference. First operand 289 states and 893 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:58,234 INFO L93 Difference]: Finished difference Result 441 states and 1301 transitions. [2021-08-06 14:32:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:58,235 INFO L225 Difference]: With dead ends: 441 [2021-08-06 14:32:58,235 INFO L226 Difference]: Without dead ends: 441 [2021-08-06 14:32:58,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-06 14:32:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 283. [2021-08-06 14:32:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.0709219858156027) internal successors, (866), 282 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 866 transitions. [2021-08-06 14:32:58,239 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 866 transitions. Word has length 18 [2021-08-06 14:32:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:58,239 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 866 transitions. [2021-08-06 14:32:58,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 866 transitions. [2021-08-06 14:32:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:58,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:58,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-08-06 14:32:58,240 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2085742599, now seen corresponding path program 62 times [2021-08-06 14:32:58,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:58,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154900664] [2021-08-06 14:32:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:58,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:58,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:58,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154900664] [2021-08-06 14:32:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154900664] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:58,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:58,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241622206] [2021-08-06 14:32:58,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:58,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:58,312 INFO L87 Difference]: Start difference. First operand 283 states and 866 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:58,413 INFO L93 Difference]: Finished difference Result 446 states and 1283 transitions. [2021-08-06 14:32:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:58,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:58,414 INFO L225 Difference]: With dead ends: 446 [2021-08-06 14:32:58,414 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 14:32:58,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 14:32:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 284. [2021-08-06 14:32:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.067137809187279) internal successors, (868), 283 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 868 transitions. [2021-08-06 14:32:58,418 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 868 transitions. Word has length 18 [2021-08-06 14:32:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:58,418 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 868 transitions. [2021-08-06 14:32:58,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 868 transitions. [2021-08-06 14:32:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:58,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:58,419 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:58,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-08-06 14:32:58,419 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1430119181, now seen corresponding path program 63 times [2021-08-06 14:32:58,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:58,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349887303] [2021-08-06 14:32:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:58,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:58,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:58,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349887303] [2021-08-06 14:32:58,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349887303] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:58,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362575126] [2021-08-06 14:32:58,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:58,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:58,483 INFO L87 Difference]: Start difference. First operand 284 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:58,606 INFO L93 Difference]: Finished difference Result 452 states and 1298 transitions. [2021-08-06 14:32:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:58,607 INFO L225 Difference]: With dead ends: 452 [2021-08-06 14:32:58,607 INFO L226 Difference]: Without dead ends: 452 [2021-08-06 14:32:58,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-06 14:32:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 281. [2021-08-06 14:32:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0464285714285713) internal successors, (853), 280 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 853 transitions. [2021-08-06 14:32:58,611 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 853 transitions. Word has length 18 [2021-08-06 14:32:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:58,611 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 853 transitions. [2021-08-06 14:32:58,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 853 transitions. [2021-08-06 14:32:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:58,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:58,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:58,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-08-06 14:32:58,612 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:58,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1536150695, now seen corresponding path program 64 times [2021-08-06 14:32:58,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:58,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611613685] [2021-08-06 14:32:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:58,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:58,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:58,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611613685] [2021-08-06 14:32:58,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611613685] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:58,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:58,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:58,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809749365] [2021-08-06 14:32:58,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:58,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:58,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:58,668 INFO L87 Difference]: Start difference. First operand 281 states and 853 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:58,765 INFO L93 Difference]: Finished difference Result 410 states and 1197 transitions. [2021-08-06 14:32:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:58,766 INFO L225 Difference]: With dead ends: 410 [2021-08-06 14:32:58,766 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 14:32:58,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:32:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 14:32:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 267. [2021-08-06 14:32:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.045112781954887) internal successors, (810), 266 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 810 transitions. [2021-08-06 14:32:58,770 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 810 transitions. Word has length 18 [2021-08-06 14:32:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:58,770 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 810 transitions. [2021-08-06 14:32:58,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 810 transitions. [2021-08-06 14:32:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:58,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:58,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:58,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-08-06 14:32:58,771 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash 304574739, now seen corresponding path program 74 times [2021-08-06 14:32:58,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:58,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177617419] [2021-08-06 14:32:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:58,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:58,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:58,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177617419] [2021-08-06 14:32:58,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177617419] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:58,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:58,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:58,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498338443] [2021-08-06 14:32:58,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:58,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:58,825 INFO L87 Difference]: Start difference. First operand 267 states and 810 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:58,953 INFO L93 Difference]: Finished difference Result 417 states and 1164 transitions. [2021-08-06 14:32:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:58,954 INFO L225 Difference]: With dead ends: 417 [2021-08-06 14:32:58,954 INFO L226 Difference]: Without dead ends: 411 [2021-08-06 14:32:58,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-08-06 14:32:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 277. [2021-08-06 14:32:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.032608695652174) internal successors, (837), 276 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 837 transitions. [2021-08-06 14:32:58,958 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 837 transitions. Word has length 18 [2021-08-06 14:32:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:58,958 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 837 transitions. [2021-08-06 14:32:58,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 837 transitions. [2021-08-06 14:32:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:58,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:58,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:58,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-08-06 14:32:58,959 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash 328474653, now seen corresponding path program 75 times [2021-08-06 14:32:58,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:58,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079423299] [2021-08-06 14:32:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:58,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:59,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:59,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079423299] [2021-08-06 14:32:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079423299] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:59,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:59,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:59,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928137055] [2021-08-06 14:32:59,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:59,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:59,017 INFO L87 Difference]: Start difference. First operand 277 states and 837 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:59,132 INFO L93 Difference]: Finished difference Result 388 states and 1110 transitions. [2021-08-06 14:32:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:59,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:59,133 INFO L225 Difference]: With dead ends: 388 [2021-08-06 14:32:59,133 INFO L226 Difference]: Without dead ends: 388 [2021-08-06 14:32:59,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-06 14:32:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 265. [2021-08-06 14:32:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0492424242424243) internal successors, (805), 264 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 805 transitions. [2021-08-06 14:32:59,137 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 805 transitions. Word has length 18 [2021-08-06 14:32:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:59,137 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 805 transitions. [2021-08-06 14:32:59,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 805 transitions. [2021-08-06 14:32:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:59,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:59,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:59,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-08-06 14:32:59,138 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1385368165, now seen corresponding path program 76 times [2021-08-06 14:32:59,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:59,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047381530] [2021-08-06 14:32:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:59,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:59,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:59,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047381530] [2021-08-06 14:32:59,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047381530] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:59,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:59,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:59,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062069524] [2021-08-06 14:32:59,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:59,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:59,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:59,201 INFO L87 Difference]: Start difference. First operand 265 states and 805 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:59,320 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-08-06 14:32:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:59,321 INFO L225 Difference]: With dead ends: 415 [2021-08-06 14:32:59,321 INFO L226 Difference]: Without dead ends: 409 [2021-08-06 14:32:59,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-06 14:32:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 277. [2021-08-06 14:32:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.039855072463768) internal successors, (839), 276 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 839 transitions. [2021-08-06 14:32:59,326 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 839 transitions. Word has length 18 [2021-08-06 14:32:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:59,326 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 839 transitions. [2021-08-06 14:32:59,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 839 transitions. [2021-08-06 14:32:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:59,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:59,326 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:59,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-08-06 14:32:59,326 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1361468251, now seen corresponding path program 77 times [2021-08-06 14:32:59,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:59,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884220472] [2021-08-06 14:32:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:59,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:59,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:59,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884220472] [2021-08-06 14:32:59,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884220472] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:59,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:59,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:59,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012789353] [2021-08-06 14:32:59,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:59,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:59,382 INFO L87 Difference]: Start difference. First operand 277 states and 839 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:59,501 INFO L93 Difference]: Finished difference Result 415 states and 1165 transitions. [2021-08-06 14:32:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:59,502 INFO L225 Difference]: With dead ends: 415 [2021-08-06 14:32:59,502 INFO L226 Difference]: Without dead ends: 415 [2021-08-06 14:32:59,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-06 14:32:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 275. [2021-08-06 14:32:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0437956204379564) internal successors, (834), 274 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 834 transitions. [2021-08-06 14:32:59,506 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 834 transitions. Word has length 18 [2021-08-06 14:32:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:59,506 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 834 transitions. [2021-08-06 14:32:59,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 834 transitions. [2021-08-06 14:32:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:32:59,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:59,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:59,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-08-06 14:32:59,507 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash -321232453, now seen corresponding path program 78 times [2021-08-06 14:32:59,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:59,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271391732] [2021-08-06 14:32:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:59,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:59,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:59,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271391732] [2021-08-06 14:32:59,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271391732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:32:59,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:32:59,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:32:59,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607873306] [2021-08-06 14:32:59,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:32:59,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:32:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:32:59,556 INFO L87 Difference]: Start difference. First operand 275 states and 834 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:59,665 INFO L93 Difference]: Finished difference Result 390 states and 1115 transitions. [2021-08-06 14:32:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:32:59,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:32:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:59,666 INFO L225 Difference]: With dead ends: 390 [2021-08-06 14:32:59,666 INFO L226 Difference]: Without dead ends: 390 [2021-08-06 14:32:59,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:32:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-06 14:32:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 263. [2021-08-06 14:32:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.053435114503817) internal successors, (800), 262 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) [2021-08-06 14:32:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 800 transitions. [2021-08-06 14:32:59,670 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 800 transitions. Word has length 18 [2021-08-06 14:32:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:59,670 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 800 transitions. [2021-08-06 14:32:59,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 800 transitions. [2021-08-06 14:32:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:32:59,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:59,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:59,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-08-06 14:32:59,671 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:59,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1378478638, now seen corresponding path program 1 times [2021-08-06 14:32:59,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:59,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802795939] [2021-08-06 14:32:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:59,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:59,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:59,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802795939] [2021-08-06 14:32:59,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802795939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:59,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857517278] [2021-08-06 14:32:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:59,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:59,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:59,909 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:59,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:33:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:01,054 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 132 treesize of output 106 [2021-08-06 14:33:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:01,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857517278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:01,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:01,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:01,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027239151] [2021-08-06 14:33:01,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:01,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:01,252 INFO L87 Difference]: Start difference. First operand 263 states and 800 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:01,780 INFO L93 Difference]: Finished difference Result 440 states and 1228 transitions. [2021-08-06 14:33:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:01,781 INFO L225 Difference]: With dead ends: 440 [2021-08-06 14:33:01,781 INFO L226 Difference]: Without dead ends: 400 [2021-08-06 14:33:01,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:33:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-06 14:33:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 273. [2021-08-06 14:33:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.036764705882353) internal successors, (826), 272 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 826 transitions. [2021-08-06 14:33:01,785 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 826 transitions. Word has length 19 [2021-08-06 14:33:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:01,785 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 826 transitions. [2021-08-06 14:33:01,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 826 transitions. [2021-08-06 14:33:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:01,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:01,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:01,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:01,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:01,986 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:01,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1769667174, now seen corresponding path program 2 times [2021-08-06 14:33:01,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:01,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442412856] [2021-08-06 14:33:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:01,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:02,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:02,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442412856] [2021-08-06 14:33:02,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442412856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:02,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711987903] [2021-08-06 14:33:02,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:02,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:02,210 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:02,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:33:02,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:02,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:03,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:33:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:03,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711987903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:03,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:03,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:03,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837595033] [2021-08-06 14:33:03,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:03,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:03,605 INFO L87 Difference]: Start difference. First operand 273 states and 826 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) [2021-08-06 14:33:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:04,302 INFO L93 Difference]: Finished difference Result 448 states and 1266 transitions. [2021-08-06 14:33:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:33:04,302 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 19 [2021-08-06 14:33:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:04,303 INFO L225 Difference]: With dead ends: 448 [2021-08-06 14:33:04,303 INFO L226 Difference]: Without dead ends: 419 [2021-08-06 14:33:04,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:33:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-06 14:33:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 276. [2021-08-06 14:33:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0327272727272727) internal successors, (834), 275 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 834 transitions. [2021-08-06 14:33:04,309 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 834 transitions. Word has length 19 [2021-08-06 14:33:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:04,309 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 834 transitions. [2021-08-06 14:33:04,309 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) [2021-08-06 14:33:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 834 transitions. [2021-08-06 14:33:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:04,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:04,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:04,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:04,532 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,SelfDestructingSolverStorable182 [2021-08-06 14:33:04,533 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1263320908, now seen corresponding path program 3 times [2021-08-06 14:33:04,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:04,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230424704] [2021-08-06 14:33:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:04,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:04,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:04,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230424704] [2021-08-06 14:33:04,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230424704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:04,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646137874] [2021-08-06 14:33:04,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:33:04,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:04,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:04,713 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:04,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:33:05,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:33:05,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:05,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 133 [2021-08-06 14:33:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:06,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646137874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:06,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:06,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:06,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726558720] [2021-08-06 14:33:06,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:06,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:06,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:06,176 INFO L87 Difference]: Start difference. First operand 276 states and 834 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:06,914 INFO L93 Difference]: Finished difference Result 463 states and 1294 transitions. [2021-08-06 14:33:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:33:06,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:06,915 INFO L225 Difference]: With dead ends: 463 [2021-08-06 14:33:06,915 INFO L226 Difference]: Without dead ends: 433 [2021-08-06 14:33:06,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 783.2ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:33:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-06 14:33:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 289. [2021-08-06 14:33:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.013888888888889) internal successors, (868), 288 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 868 transitions. [2021-08-06 14:33:06,920 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 868 transitions. Word has length 19 [2021-08-06 14:33:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:06,920 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 868 transitions. [2021-08-06 14:33:06,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 868 transitions. [2021-08-06 14:33:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:06,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:06,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:06,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:07,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:07,121 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 914263706, now seen corresponding path program 4 times [2021-08-06 14:33:07,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:07,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734579599] [2021-08-06 14:33:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:07,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:07,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:07,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734579599] [2021-08-06 14:33:07,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734579599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:07,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657372429] [2021-08-06 14:33:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:33:07,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:07,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:07,421 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:07,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:33:08,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:08,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 152 [2021-08-06 14:33:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:09,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657372429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:09,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:09,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:09,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775931962] [2021-08-06 14:33:09,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:09,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:09,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:09,041 INFO L87 Difference]: Start difference. First operand 289 states and 868 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:09,987 INFO L93 Difference]: Finished difference Result 479 states and 1322 transitions. [2021-08-06 14:33:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:33:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:09,988 INFO L225 Difference]: With dead ends: 479 [2021-08-06 14:33:09,988 INFO L226 Difference]: Without dead ends: 429 [2021-08-06 14:33:09,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1067.3ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:33:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-06 14:33:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 295. [2021-08-06 14:33:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0170068027210886) internal successors, (887), 294 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 887 transitions. [2021-08-06 14:33:09,992 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 887 transitions. Word has length 19 [2021-08-06 14:33:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:09,992 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 887 transitions. [2021-08-06 14:33:09,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 887 transitions. [2021-08-06 14:33:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:09,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:09,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:10,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:10,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:10,193 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1231907054, now seen corresponding path program 5 times [2021-08-06 14:33:10,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:10,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763313268] [2021-08-06 14:33:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:10,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:10,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:10,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763313268] [2021-08-06 14:33:10,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763313268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:10,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669723723] [2021-08-06 14:33:10,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:10,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:10,382 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:10,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:33:11,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:33:11,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:11,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:11,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:11,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:33:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:11,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669723723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:11,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:11,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 14:33:11,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563927281] [2021-08-06 14:33:11,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:33:11,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:33:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:33:11,861 INFO L87 Difference]: Start difference. First operand 295 states and 887 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) [2021-08-06 14:33:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:12,582 INFO L93 Difference]: Finished difference Result 462 states and 1306 transitions. [2021-08-06 14:33:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:33:12,582 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 19 [2021-08-06 14:33:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:12,583 INFO L225 Difference]: With dead ends: 462 [2021-08-06 14:33:12,583 INFO L226 Difference]: Without dead ends: 418 [2021-08-06 14:33:12,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:33:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-06 14:33:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 304. [2021-08-06 14:33:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0066006600660065) internal successors, (911), 303 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-08-06 14:33:12,587 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 19 [2021-08-06 14:33:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:12,587 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-08-06 14:33:12,587 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) [2021-08-06 14:33:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-08-06 14:33:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:12,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:12,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:12,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 14:33:12,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:12,788 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash 377522628, now seen corresponding path program 6 times [2021-08-06 14:33:12,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:12,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267635137] [2021-08-06 14:33:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:12,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:12,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:12,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267635137] [2021-08-06 14:33:12,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267635137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:12,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841986899] [2021-08-06 14:33:12,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:33:12,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:12,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:12,959 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:12,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:33:13,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:33:13,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:13,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:14,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:33:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:14,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841986899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:14,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:14,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:14,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518254873] [2021-08-06 14:33:14,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:14,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:14,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:14,499 INFO L87 Difference]: Start difference. First operand 304 states and 911 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:15,015 INFO L93 Difference]: Finished difference Result 439 states and 1254 transitions. [2021-08-06 14:33:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:33:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:15,016 INFO L225 Difference]: With dead ends: 439 [2021-08-06 14:33:15,016 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 14:33:15,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:33:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 14:33:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 313. [2021-08-06 14:33:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-08-06 14:33:15,020 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 19 [2021-08-06 14:33:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:15,020 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-08-06 14:33:15,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-08-06 14:33:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:15,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:15,020 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:15,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:15,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:15,221 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:15,221 INFO L82 PathProgramCache]: Analyzing trace with hash 28465426, now seen corresponding path program 7 times [2021-08-06 14:33:15,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:15,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750689367] [2021-08-06 14:33:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:15,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:15,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750689367] [2021-08-06 14:33:15,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750689367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36292463] [2021-08-06 14:33:15,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:33:15,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:15,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:15,417 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:15,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:33:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 149 [2021-08-06 14:33:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:17,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36292463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:17,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:17,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:17,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976555000] [2021-08-06 14:33:17,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:17,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:17,144 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:17,820 INFO L93 Difference]: Finished difference Result 463 states and 1302 transitions. [2021-08-06 14:33:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:33:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:17,821 INFO L225 Difference]: With dead ends: 463 [2021-08-06 14:33:17,821 INFO L226 Difference]: Without dead ends: 413 [2021-08-06 14:33:17,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:33:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-06 14:33:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 313. [2021-08-06 14:33:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-08-06 14:33:17,825 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 19 [2021-08-06 14:33:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:17,825 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-08-06 14:33:17,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-08-06 14:33:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:17,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:17,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:17,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 14:33:18,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:18,030 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:18,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2117705334, now seen corresponding path program 8 times [2021-08-06 14:33:18,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:18,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274646997] [2021-08-06 14:33:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:18,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:18,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:18,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274646997] [2021-08-06 14:33:18,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274646997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:18,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925398671] [2021-08-06 14:33:18,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:18,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:18,277 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:18,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:33:19,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:19,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:19,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:33:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:19,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925398671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:19,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:19,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:19,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342721395] [2021-08-06 14:33:19,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:19,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:19,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:19,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:19,900 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:20,995 INFO L93 Difference]: Finished difference Result 516 states and 1434 transitions. [2021-08-06 14:33:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:33:20,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:20,997 INFO L225 Difference]: With dead ends: 516 [2021-08-06 14:33:20,997 INFO L226 Difference]: Without dead ends: 471 [2021-08-06 14:33:20,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1126.3ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:33:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-06 14:33:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 319. [2021-08-06 14:33:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.018867924528302) internal successors, (960), 318 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) [2021-08-06 14:33:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 960 transitions. [2021-08-06 14:33:21,001 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 960 transitions. Word has length 19 [2021-08-06 14:33:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:21,001 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 960 transitions. [2021-08-06 14:33:21,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 960 transitions. [2021-08-06 14:33:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:21,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:21,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:21,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 14:33:21,202 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,SelfDestructingSolverStorable188 [2021-08-06 14:33:21,202 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1529960012, now seen corresponding path program 9 times [2021-08-06 14:33:21,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:21,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6176484] [2021-08-06 14:33:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:21,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:21,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:21,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6176484] [2021-08-06 14:33:21,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6176484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:21,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235294274] [2021-08-06 14:33:21,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:33:21,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:21,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:21,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:21,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:33:22,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:33:22,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:22,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:22,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 112 [2021-08-06 14:33:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:23,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235294274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:23,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:23,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 14:33:23,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565379980] [2021-08-06 14:33:23,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:33:23,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:33:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:33:23,149 INFO L87 Difference]: Start difference. First operand 319 states and 960 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) [2021-08-06 14:33:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:24,058 INFO L93 Difference]: Finished difference Result 591 states and 1629 transitions. [2021-08-06 14:33:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:33:24,058 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 19 [2021-08-06 14:33:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:24,059 INFO L225 Difference]: With dead ends: 591 [2021-08-06 14:33:24,059 INFO L226 Difference]: Without dead ends: 561 [2021-08-06 14:33:24,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 993.2ms TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:33:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-06 14:33:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 331. [2021-08-06 14:33:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0606060606060606) internal successors, (1010), 330 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) [2021-08-06 14:33:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1010 transitions. [2021-08-06 14:33:24,064 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1010 transitions. Word has length 19 [2021-08-06 14:33:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:24,064 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1010 transitions. [2021-08-06 14:33:24,064 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) [2021-08-06 14:33:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1010 transitions. [2021-08-06 14:33:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:24,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:24,065 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:24,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:24,265 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,SelfDestructingSolverStorable189 [2021-08-06 14:33:24,265 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash -647882578, now seen corresponding path program 10 times [2021-08-06 14:33:24,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:24,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016973118] [2021-08-06 14:33:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:24,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:24,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:24,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016973118] [2021-08-06 14:33:24,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016973118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:24,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694747190] [2021-08-06 14:33:24,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:33:24,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:24,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:24,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:24,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:33:25,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:25,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:25,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:26,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 130 [2021-08-06 14:33:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:26,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694747190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:26,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:26,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:26,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083009840] [2021-08-06 14:33:26,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:26,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:26,294 INFO L87 Difference]: Start difference. First operand 331 states and 1010 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:26,821 INFO L93 Difference]: Finished difference Result 516 states and 1459 transitions. [2021-08-06 14:33:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:26,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 19 [2021-08-06 14:33:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:26,822 INFO L225 Difference]: With dead ends: 516 [2021-08-06 14:33:26,822 INFO L226 Difference]: Without dead ends: 489 [2021-08-06 14:33:26,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:33:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-06 14:33:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 331. [2021-08-06 14:33:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0515151515151517) internal successors, (1007), 330 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1007 transitions. [2021-08-06 14:33:26,826 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1007 transitions. Word has length 19 [2021-08-06 14:33:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:26,826 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1007 transitions. [2021-08-06 14:33:26,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1007 transitions. [2021-08-06 14:33:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:26,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:26,827 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:26,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:27,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:27,029 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash 427828578, now seen corresponding path program 11 times [2021-08-06 14:33:27,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:27,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657818350] [2021-08-06 14:33:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:27,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:27,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:27,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657818350] [2021-08-06 14:33:27,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657818350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:27,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492497120] [2021-08-06 14:33:27,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:27,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:27,271 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:27,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:33:28,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:28,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 130 [2021-08-06 14:33:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:29,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492497120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:29,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:29,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 14:33:29,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918845860] [2021-08-06 14:33:29,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:33:29,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:33:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:33:29,014 INFO L87 Difference]: Start difference. First operand 331 states and 1007 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) [2021-08-06 14:33:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:29,456 INFO L93 Difference]: Finished difference Result 510 states and 1443 transitions. [2021-08-06 14:33:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:29,456 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 19 [2021-08-06 14:33:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:29,457 INFO L225 Difference]: With dead ends: 510 [2021-08-06 14:33:29,457 INFO L226 Difference]: Without dead ends: 477 [2021-08-06 14:33:29,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 533.2ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:33:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-08-06 14:33:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 331. [2021-08-06 14:33:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0424242424242425) internal successors, (1004), 330 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) [2021-08-06 14:33:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1004 transitions. [2021-08-06 14:33:29,462 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1004 transitions. Word has length 19 [2021-08-06 14:33:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:29,462 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1004 transitions. [2021-08-06 14:33:29,462 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) [2021-08-06 14:33:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1004 transitions. [2021-08-06 14:33:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:29,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:29,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:29,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:29,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:29,663 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash -30499761, now seen corresponding path program 1 times [2021-08-06 14:33:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:29,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786563459] [2021-08-06 14:33:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:29,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:33:29,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:29,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786563459] [2021-08-06 14:33:29,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786563459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:29,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66962966] [2021-08-06 14:33:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:29,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:29,702 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) [2021-08-06 14:33:29,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:33:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:30,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:33:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:33:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66962966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:31,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:31,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:33:31,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457843754] [2021-08-06 14:33:31,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:33:31,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:31,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:33:31,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:33:31,066 INFO L87 Difference]: Start difference. First operand 331 states and 1004 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:31,146 INFO L93 Difference]: Finished difference Result 545 states and 1605 transitions. [2021-08-06 14:33:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:33:31,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:31,147 INFO L225 Difference]: With dead ends: 545 [2021-08-06 14:33:31,147 INFO L226 Difference]: Without dead ends: 441 [2021-08-06 14:33:31,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:33:31,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-06 14:33:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 375. [2021-08-06 14:33:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.0588235294117645) internal successors, (1144), 374 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1144 transitions. [2021-08-06 14:33:31,151 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1144 transitions. Word has length 19 [2021-08-06 14:33:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:31,151 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1144 transitions. [2021-08-06 14:33:31,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1144 transitions. [2021-08-06 14:33:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:31,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:31,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:31,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:31,376 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,SelfDestructingSolverStorable192 [2021-08-06 14:33:31,377 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1773562618, now seen corresponding path program 12 times [2021-08-06 14:33:31,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:31,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865616350] [2021-08-06 14:33:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:31,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:31,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:31,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865616350] [2021-08-06 14:33:31,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865616350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:31,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935203922] [2021-08-06 14:33:31,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:33:31,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:31,581 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) [2021-08-06 14:33:31,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:33:32,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:33:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:33,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:33:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:33,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935203922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:33,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:33,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:33,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263280037] [2021-08-06 14:33:33,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:33,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:33,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:33,414 INFO L87 Difference]: Start difference. First operand 375 states and 1144 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) [2021-08-06 14:33:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:34,544 INFO L93 Difference]: Finished difference Result 670 states and 1887 transitions. [2021-08-06 14:33:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:33:34,544 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 19 [2021-08-06 14:33:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:34,545 INFO L225 Difference]: With dead ends: 670 [2021-08-06 14:33:34,545 INFO L226 Difference]: Without dead ends: 623 [2021-08-06 14:33:34,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1125.7ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:33:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-08-06 14:33:34,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 382. [2021-08-06 14:33:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.062992125984252) internal successors, (1167), 381 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1167 transitions. [2021-08-06 14:33:34,551 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1167 transitions. Word has length 19 [2021-08-06 14:33:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:34,551 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1167 transitions. [2021-08-06 14:33:34,551 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) [2021-08-06 14:33:34,551 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1167 transitions. [2021-08-06 14:33:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:34,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:34,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:34,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:34,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:34,752 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 120394868, now seen corresponding path program 13 times [2021-08-06 14:33:34,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:34,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450868731] [2021-08-06 14:33:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:34,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:34,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:34,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450868731] [2021-08-06 14:33:34,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450868731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:34,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824436033] [2021-08-06 14:33:34,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:33:34,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:34,981 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) [2021-08-06 14:33:34,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:33:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:36,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-06 14:33:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:37,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824436033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:37,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:37,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:37,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61839541] [2021-08-06 14:33:37,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:37,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:37,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:37,019 INFO L87 Difference]: Start difference. First operand 382 states and 1167 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) [2021-08-06 14:33:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:37,766 INFO L93 Difference]: Finished difference Result 633 states and 1776 transitions. [2021-08-06 14:33:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:33:37,766 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 19 [2021-08-06 14:33:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:37,767 INFO L225 Difference]: With dead ends: 633 [2021-08-06 14:33:37,767 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 14:33:37,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:33:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 14:33:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 388. [2021-08-06 14:33:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.056847545219638) internal successors, (1183), 387 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1183 transitions. [2021-08-06 14:33:37,773 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1183 transitions. Word has length 19 [2021-08-06 14:33:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:37,773 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1183 transitions. [2021-08-06 14:33:37,773 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) [2021-08-06 14:33:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1183 transitions. [2021-08-06 14:33:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:37,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:37,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:37,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:37,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:37,974 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash -228662334, now seen corresponding path program 14 times [2021-08-06 14:33:37,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:37,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434169046] [2021-08-06 14:33:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:37,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:38,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:38,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434169046] [2021-08-06 14:33:38,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434169046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:38,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449635063] [2021-08-06 14:33:38,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:38,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:38,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:38,194 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) [2021-08-06 14:33:38,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:33:39,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:39,841 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 160 treesize of output 128 [2021-08-06 14:33:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:40,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449635063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:40,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:40,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:40,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497087758] [2021-08-06 14:33:40,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:40,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:40,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:40,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:40,180 INFO L87 Difference]: Start difference. First operand 388 states and 1183 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) [2021-08-06 14:33:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:40,981 INFO L93 Difference]: Finished difference Result 630 states and 1779 transitions. [2021-08-06 14:33:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:33:40,981 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 19 [2021-08-06 14:33:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:40,982 INFO L225 Difference]: With dead ends: 630 [2021-08-06 14:33:40,982 INFO L226 Difference]: Without dead ends: 615 [2021-08-06 14:33:40,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 809.6ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:33:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-06 14:33:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 385. [2021-08-06 14:33:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0598958333333335) internal successors, (1175), 384 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1175 transitions. [2021-08-06 14:33:40,988 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1175 transitions. Word has length 19 [2021-08-06 14:33:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:40,988 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1175 transitions. [2021-08-06 14:33:40,988 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) [2021-08-06 14:33:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1175 transitions. [2021-08-06 14:33:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:40,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:40,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:41,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 14:33:41,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:41,189 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:41,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1920134202, now seen corresponding path program 15 times [2021-08-06 14:33:41,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:41,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057700440] [2021-08-06 14:33:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:41,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:41,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:41,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057700440] [2021-08-06 14:33:41,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057700440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:41,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987449401] [2021-08-06 14:33:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:33:41,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:41,417 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) [2021-08-06 14:33:41,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:33:42,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:33:42,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:43,037 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 134 treesize of output 108 [2021-08-06 14:33:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:43,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987449401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:43,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:43,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:33:43,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13406425] [2021-08-06 14:33:43,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:43,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:43,352 INFO L87 Difference]: Start difference. First operand 385 states and 1175 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:44,093 INFO L93 Difference]: Finished difference Result 573 states and 1646 transitions. [2021-08-06 14:33:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:33:44,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:33:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:44,099 INFO L225 Difference]: With dead ends: 573 [2021-08-06 14:33:44,099 INFO L226 Difference]: Without dead ends: 529 [2021-08-06 14:33:44,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 767.4ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:33:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-06 14:33:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 385. [2021-08-06 14:33:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0598958333333335) internal successors, (1175), 384 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1175 transitions. [2021-08-06 14:33:44,106 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1175 transitions. Word has length 19 [2021-08-06 14:33:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:44,106 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1175 transitions. [2021-08-06 14:33:44,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1175 transitions. [2021-08-06 14:33:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:44,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:44,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:44,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:44,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:44,333 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash 811329456, now seen corresponding path program 16 times [2021-08-06 14:33:44,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:44,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888149385] [2021-08-06 14:33:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:44,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:44,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:44,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888149385] [2021-08-06 14:33:44,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888149385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:44,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765834954] [2021-08-06 14:33:44,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:33:44,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:44,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:44,589 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) [2021-08-06 14:33:44,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:33:45,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:46,665 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 132 treesize of output 106 [2021-08-06 14:33:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:46,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765834954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:46,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:46,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:46,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259596824] [2021-08-06 14:33:46,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:46,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:46,846 INFO L87 Difference]: Start difference. First operand 385 states and 1175 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) [2021-08-06 14:33:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:47,483 INFO L93 Difference]: Finished difference Result 697 states and 1960 transitions. [2021-08-06 14:33:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:47,484 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 19 [2021-08-06 14:33:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:47,485 INFO L225 Difference]: With dead ends: 697 [2021-08-06 14:33:47,485 INFO L226 Difference]: Without dead ends: 657 [2021-08-06 14:33:47,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:33:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-06 14:33:47,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 392. [2021-08-06 14:33:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0639386189258313) internal successors, (1198), 391 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1198 transitions. [2021-08-06 14:33:47,490 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1198 transitions. Word has length 19 [2021-08-06 14:33:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:47,490 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1198 transitions. [2021-08-06 14:33:47,490 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) [2021-08-06 14:33:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1198 transitions. [2021-08-06 14:33:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:47,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:47,491 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:47,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:47,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:47,692 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:47,692 INFO L82 PathProgramCache]: Analyzing trace with hash -335492028, now seen corresponding path program 17 times [2021-08-06 14:33:47,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:47,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651062584] [2021-08-06 14:33:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:47,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:47,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:47,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651062584] [2021-08-06 14:33:47,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651062584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:47,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052117732] [2021-08-06 14:33:47,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:47,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:47,941 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) [2021-08-06 14:33:47,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:33:49,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:49,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:33:49,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:50,207 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 158 treesize of output 126 [2021-08-06 14:33:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:50,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052117732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:50,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:50,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321362627] [2021-08-06 14:33:50,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:50,411 INFO L87 Difference]: Start difference. First operand 392 states and 1198 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) [2021-08-06 14:33:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:51,120 INFO L93 Difference]: Finished difference Result 665 states and 1895 transitions. [2021-08-06 14:33:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:51,120 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 19 [2021-08-06 14:33:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:51,121 INFO L225 Difference]: With dead ends: 665 [2021-08-06 14:33:51,121 INFO L226 Difference]: Without dead ends: 636 [2021-08-06 14:33:51,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:33:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-06 14:33:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 395. [2021-08-06 14:33:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0609137055837565) internal successors, (1206), 394 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1206 transitions. [2021-08-06 14:33:51,127 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1206 transitions. Word has length 19 [2021-08-06 14:33:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:51,127 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1206 transitions. [2021-08-06 14:33:51,127 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) [2021-08-06 14:33:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1206 transitions. [2021-08-06 14:33:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:51,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:51,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:51,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:51,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:51,328 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash -684549230, now seen corresponding path program 18 times [2021-08-06 14:33:51,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:51,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403030680] [2021-08-06 14:33:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:51,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:51,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:51,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403030680] [2021-08-06 14:33:51,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403030680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:51,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960242642] [2021-08-06 14:33:51,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:33:51,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:51,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:51,599 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) [2021-08-06 14:33:51,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:33:52,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:33:52,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:33:52,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:53,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:33:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:53,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960242642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:53,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:53,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:53,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899316723] [2021-08-06 14:33:53,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:53,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:53,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:53,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:53,885 INFO L87 Difference]: Start difference. First operand 395 states and 1206 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) [2021-08-06 14:33:55,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:55,127 INFO L93 Difference]: Finished difference Result 729 states and 2052 transitions. [2021-08-06 14:33:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:33:55,128 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 19 [2021-08-06 14:33:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:55,129 INFO L225 Difference]: With dead ends: 729 [2021-08-06 14:33:55,129 INFO L226 Difference]: Without dead ends: 685 [2021-08-06 14:33:55,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1275.1ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:33:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-06 14:33:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 402. [2021-08-06 14:33:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.0473815461346634) internal successors, (1222), 401 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) [2021-08-06 14:33:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1222 transitions. [2021-08-06 14:33:55,135 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1222 transitions. Word has length 19 [2021-08-06 14:33:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:55,135 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1222 transitions. [2021-08-06 14:33:55,135 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) [2021-08-06 14:33:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1222 transitions. [2021-08-06 14:33:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:55,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:55,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:55,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:55,336 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,SelfDestructingSolverStorable199 [2021-08-06 14:33:55,336 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -297463948, now seen corresponding path program 19 times [2021-08-06 14:33:55,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:55,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137444802] [2021-08-06 14:33:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:55,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:55,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137444802] [2021-08-06 14:33:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137444802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12778465] [2021-08-06 14:33:55,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:33:55,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:55,575 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) [2021-08-06 14:33:55,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 14:33:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:33:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:57,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-06 14:33:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:58,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12778465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:58,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:58,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:33:58,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650620728] [2021-08-06 14:33:58,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:58,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:58,082 INFO L87 Difference]: Start difference. First operand 402 states and 1222 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) [2021-08-06 14:33:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:59,262 INFO L93 Difference]: Finished difference Result 628 states and 1802 transitions. [2021-08-06 14:33:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:59,263 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 19 [2021-08-06 14:33:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:59,264 INFO L225 Difference]: With dead ends: 628 [2021-08-06 14:33:59,264 INFO L226 Difference]: Without dead ends: 599 [2021-08-06 14:33:59,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1312.1ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:33:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-08-06 14:33:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 404. [2021-08-06 14:33:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0496277915632755) internal successors, (1229), 403 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1229 transitions. [2021-08-06 14:33:59,269 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1229 transitions. Word has length 19 [2021-08-06 14:33:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:59,269 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1229 transitions. [2021-08-06 14:33:59,269 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) [2021-08-06 14:33:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1229 transitions. [2021-08-06 14:33:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:33:59,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:59,270 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:59,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:59,470 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,SelfDestructingSolverStorable200 [2021-08-06 14:33:59,470 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash 771773518, now seen corresponding path program 20 times [2021-08-06 14:33:59,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:59,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793432096] [2021-08-06 14:33:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:59,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:59,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:59,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793432096] [2021-08-06 14:33:59,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793432096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:59,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720688995] [2021-08-06 14:33:59,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:59,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:59,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:59,725 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) [2021-08-06 14:33:59,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 14:34:01,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:01,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:34:01,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:01,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 132 [2021-08-06 14:34:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:02,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720688995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:02,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:02,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:02,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166427973] [2021-08-06 14:34:02,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:02,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:02,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:02,365 INFO L87 Difference]: Start difference. First operand 404 states and 1229 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) [2021-08-06 14:34:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:05,014 INFO L93 Difference]: Finished difference Result 784 states and 2220 transitions. [2021-08-06 14:34:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:34:05,018 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 19 [2021-08-06 14:34:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:05,019 INFO L225 Difference]: With dead ends: 784 [2021-08-06 14:34:05,019 INFO L226 Difference]: Without dead ends: 740 [2021-08-06 14:34:05,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2631.6ms TimeCoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:34:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-08-06 14:34:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 406. [2021-08-06 14:34:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.0691358024691358) internal successors, (1243), 405 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1243 transitions. [2021-08-06 14:34:05,026 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1243 transitions. Word has length 19 [2021-08-06 14:34:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:05,026 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1243 transitions. [2021-08-06 14:34:05,026 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) [2021-08-06 14:34:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1243 transitions. [2021-08-06 14:34:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:05,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:05,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:05,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:05,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-06 14:34:05,227 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:05,227 INFO L82 PathProgramCache]: Analyzing trace with hash 866820340, now seen corresponding path program 21 times [2021-08-06 14:34:05,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:05,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88741651] [2021-08-06 14:34:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:05,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:05,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:05,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88741651] [2021-08-06 14:34:05,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88741651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:05,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148497946] [2021-08-06 14:34:05,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:05,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:05,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:05,494 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) [2021-08-06 14:34:05,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 14:34:07,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:34:07,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:07,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:34:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:07,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:34:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148497946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:08,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:08,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:08,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500273847] [2021-08-06 14:34:08,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:08,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:08,107 INFO L87 Difference]: Start difference. First operand 406 states and 1243 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) [2021-08-06 14:34:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:08,987 INFO L93 Difference]: Finished difference Result 667 states and 1933 transitions. [2021-08-06 14:34:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:34:08,988 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 19 [2021-08-06 14:34:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:08,989 INFO L225 Difference]: With dead ends: 667 [2021-08-06 14:34:08,989 INFO L226 Difference]: Without dead ends: 638 [2021-08-06 14:34:08,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 940.8ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:34:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-06 14:34:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 406. [2021-08-06 14:34:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.0691358024691358) internal successors, (1243), 405 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1243 transitions. [2021-08-06 14:34:08,994 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1243 transitions. Word has length 19 [2021-08-06 14:34:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:08,994 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1243 transitions. [2021-08-06 14:34:08,994 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) [2021-08-06 14:34:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1243 transitions. [2021-08-06 14:34:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:08,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:08,995 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:09,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:09,195 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,SelfDestructingSolverStorable202 [2021-08-06 14:34:09,195 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1262627388, now seen corresponding path program 22 times [2021-08-06 14:34:09,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:09,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665148186] [2021-08-06 14:34:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:09,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:09,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:09,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665148186] [2021-08-06 14:34:09,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665148186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:09,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258812543] [2021-08-06 14:34:09,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:34:09,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:09,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:09,413 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) [2021-08-06 14:34:09,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 14:34:11,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:34:11,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:34:11,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:11,775 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 158 treesize of output 126 [2021-08-06 14:34:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:11,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258812543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:11,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:11,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:11,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146343124] [2021-08-06 14:34:11,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:11,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:11,963 INFO L87 Difference]: Start difference. First operand 406 states and 1243 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) [2021-08-06 14:34:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:12,637 INFO L93 Difference]: Finished difference Result 614 states and 1752 transitions. [2021-08-06 14:34:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:34:12,638 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 19 [2021-08-06 14:34:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:12,639 INFO L225 Difference]: With dead ends: 614 [2021-08-06 14:34:12,639 INFO L226 Difference]: Without dead ends: 585 [2021-08-06 14:34:12,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 727.9ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:34:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-06 14:34:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 413. [2021-08-06 14:34:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.070388349514563) internal successors, (1265), 412 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1265 transitions. [2021-08-06 14:34:12,644 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1265 transitions. Word has length 19 [2021-08-06 14:34:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:12,644 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1265 transitions. [2021-08-06 14:34:12,644 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) [2021-08-06 14:34:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1265 transitions. [2021-08-06 14:34:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:12,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:12,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:12,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:12,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:12,845 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1611684590, now seen corresponding path program 23 times [2021-08-06 14:34:12,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:12,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617319020] [2021-08-06 14:34:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:12,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:13,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:13,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617319020] [2021-08-06 14:34:13,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617319020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:13,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447813661] [2021-08-06 14:34:13,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:34:13,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:13,081 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) [2021-08-06 14:34:13,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 14:34:14,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:14,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:34:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:15,348 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 171 treesize of output 135 [2021-08-06 14:34:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:15,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447813661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:15,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:15,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:15,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141504152] [2021-08-06 14:34:15,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:15,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:15,662 INFO L87 Difference]: Start difference. First operand 413 states and 1265 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) [2021-08-06 14:34:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:16,568 INFO L93 Difference]: Finished difference Result 662 states and 1857 transitions. [2021-08-06 14:34:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:34:16,568 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 19 [2021-08-06 14:34:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:16,569 INFO L225 Difference]: With dead ends: 662 [2021-08-06 14:34:16,569 INFO L226 Difference]: Without dead ends: 632 [2021-08-06 14:34:16,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 960.6ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:34:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-08-06 14:34:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 416. [2021-08-06 14:34:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.0746987951807228) internal successors, (1276), 415 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1276 transitions. [2021-08-06 14:34:16,574 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1276 transitions. Word has length 19 [2021-08-06 14:34:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:16,575 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1276 transitions. [2021-08-06 14:34:16,575 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) [2021-08-06 14:34:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1276 transitions. [2021-08-06 14:34:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:16,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:16,575 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:16,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:16,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:16,776 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash 537111946, now seen corresponding path program 24 times [2021-08-06 14:34:16,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:16,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903994811] [2021-08-06 14:34:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:16,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:16,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:16,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903994811] [2021-08-06 14:34:16,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903994811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:16,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831694731] [2021-08-06 14:34:16,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:34:16,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:16,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:16,985 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) [2021-08-06 14:34:16,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 14:34:18,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:34:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:18,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:34:18,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-06 14:34:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831694731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:19,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:19,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713728491] [2021-08-06 14:34:19,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:19,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:19,748 INFO L87 Difference]: Start difference. First operand 416 states and 1276 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) [2021-08-06 14:34:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:20,610 INFO L93 Difference]: Finished difference Result 626 states and 1791 transitions. [2021-08-06 14:34:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:34:20,611 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 19 [2021-08-06 14:34:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:20,612 INFO L225 Difference]: With dead ends: 626 [2021-08-06 14:34:20,612 INFO L226 Difference]: Without dead ends: 583 [2021-08-06 14:34:20,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:34:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-06 14:34:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 422. [2021-08-06 14:34:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0760095011876483) internal successors, (1295), 421 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1295 transitions. [2021-08-06 14:34:20,618 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1295 transitions. Word has length 19 [2021-08-06 14:34:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:20,618 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1295 transitions. [2021-08-06 14:34:20,618 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) [2021-08-06 14:34:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1295 transitions. [2021-08-06 14:34:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:20,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:20,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:20,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 14:34:20,819 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,SelfDestructingSolverStorable205 [2021-08-06 14:34:20,819 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 230353486, now seen corresponding path program 25 times [2021-08-06 14:34:20,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:20,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897768904] [2021-08-06 14:34:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:20,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:21,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:21,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897768904] [2021-08-06 14:34:21,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897768904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:21,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792143567] [2021-08-06 14:34:21,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:34:21,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:21,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:21,054 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) [2021-08-06 14:34:21,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 14:34:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:22,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:34:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:23,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2021-08-06 14:34:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:24,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792143567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:24,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:24,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:24,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703879455] [2021-08-06 14:34:24,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:24,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:24,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:24,004 INFO L87 Difference]: Start difference. First operand 422 states and 1295 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) [2021-08-06 14:34:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:24,742 INFO L93 Difference]: Finished difference Result 586 states and 1700 transitions. [2021-08-06 14:34:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:34:24,743 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 19 [2021-08-06 14:34:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:24,743 INFO L225 Difference]: With dead ends: 586 [2021-08-06 14:34:24,743 INFO L226 Difference]: Without dead ends: 557 [2021-08-06 14:34:24,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 847.4ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:34:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-06 14:34:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 426. [2021-08-06 14:34:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.08) internal successors, (1309), 425 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1309 transitions. [2021-08-06 14:34:24,750 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1309 transitions. Word has length 19 [2021-08-06 14:34:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:24,750 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1309 transitions. [2021-08-06 14:34:24,750 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) [2021-08-06 14:34:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1309 transitions. [2021-08-06 14:34:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:24,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:24,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:24,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 14:34:24,952 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,SelfDestructingSolverStorable206 [2021-08-06 14:34:24,953 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash -118703716, now seen corresponding path program 26 times [2021-08-06 14:34:24,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:24,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372240359] [2021-08-06 14:34:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:24,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:25,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:25,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372240359] [2021-08-06 14:34:25,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372240359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:25,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849082726] [2021-08-06 14:34:25,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:34:25,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:25,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:25,196 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) [2021-08-06 14:34:25,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 14:34:27,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:34:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:34:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:28,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849082726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:28,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:28,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:28,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118397333] [2021-08-06 14:34:28,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:28,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:28,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:28,020 INFO L87 Difference]: Start difference. First operand 426 states and 1309 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) [2021-08-06 14:34:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:28,891 INFO L93 Difference]: Finished difference Result 650 states and 1857 transitions. [2021-08-06 14:34:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:34:28,891 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 19 [2021-08-06 14:34:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:28,892 INFO L225 Difference]: With dead ends: 650 [2021-08-06 14:34:28,892 INFO L226 Difference]: Without dead ends: 606 [2021-08-06 14:34:28,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 892.4ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:34:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-08-06 14:34:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 425. [2021-08-06 14:34:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.089622641509434) internal successors, (1310), 424 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1310 transitions. [2021-08-06 14:34:28,897 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1310 transitions. Word has length 19 [2021-08-06 14:34:28,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:28,897 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1310 transitions. [2021-08-06 14:34:28,897 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) [2021-08-06 14:34:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1310 transitions. [2021-08-06 14:34:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:28,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:28,898 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:28,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:29,098 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,SelfDestructingSolverStorable207 [2021-08-06 14:34:29,099 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:29,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1216369290, now seen corresponding path program 27 times [2021-08-06 14:34:29,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:29,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555104147] [2021-08-06 14:34:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:29,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:29,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:29,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555104147] [2021-08-06 14:34:29,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555104147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:29,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879447046] [2021-08-06 14:34:29,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:29,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:29,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:29,386 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) [2021-08-06 14:34:29,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 14:34:31,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:34:31,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:31,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:34:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:32,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 152 [2021-08-06 14:34:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:32,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879447046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:32,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:32,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:32,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807943237] [2021-08-06 14:34:32,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:32,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:32,461 INFO L87 Difference]: Start difference. First operand 425 states and 1310 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) [2021-08-06 14:34:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:33,336 INFO L93 Difference]: Finished difference Result 609 states and 1803 transitions. [2021-08-06 14:34:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:34:33,336 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 19 [2021-08-06 14:34:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:33,337 INFO L225 Difference]: With dead ends: 609 [2021-08-06 14:34:33,337 INFO L226 Difference]: Without dead ends: 594 [2021-08-06 14:34:33,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 915.7ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:34:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-06 14:34:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 425. [2021-08-06 14:34:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.089622641509434) internal successors, (1310), 424 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1310 transitions. [2021-08-06 14:34:33,343 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1310 transitions. Word has length 19 [2021-08-06 14:34:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:33,343 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1310 transitions. [2021-08-06 14:34:33,343 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) [2021-08-06 14:34:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1310 transitions. [2021-08-06 14:34:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:33,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:33,343 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:33,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:33,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:33,544 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash -221592246, now seen corresponding path program 28 times [2021-08-06 14:34:33,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:33,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109271608] [2021-08-06 14:34:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:33,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:33,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:33,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109271608] [2021-08-06 14:34:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109271608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:33,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086095008] [2021-08-06 14:34:33,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:34:33,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:33,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:33,833 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) [2021-08-06 14:34:33,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 14:34:35,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:34:35,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:34:35,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:36,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 122 [2021-08-06 14:34:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:37,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086095008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:37,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:37,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:37,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508011650] [2021-08-06 14:34:37,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:37,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:37,138 INFO L87 Difference]: Start difference. First operand 425 states and 1310 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) [2021-08-06 14:34:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:37,822 INFO L93 Difference]: Finished difference Result 652 states and 1889 transitions. [2021-08-06 14:34:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:34:37,823 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 19 [2021-08-06 14:34:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:37,823 INFO L225 Difference]: With dead ends: 652 [2021-08-06 14:34:37,824 INFO L226 Difference]: Without dead ends: 624 [2021-08-06 14:34:37,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:34:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-08-06 14:34:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 433. [2021-08-06 14:34:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1064814814814814) internal successors, (1342), 432 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1342 transitions. [2021-08-06 14:34:37,829 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1342 transitions. Word has length 19 [2021-08-06 14:34:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:37,829 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1342 transitions. [2021-08-06 14:34:37,829 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) [2021-08-06 14:34:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1342 transitions. [2021-08-06 14:34:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:37,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:37,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:37,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:38,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:38,033 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash 772783374, now seen corresponding path program 29 times [2021-08-06 14:34:38,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:38,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195122842] [2021-08-06 14:34:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:38,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:38,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:38,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195122842] [2021-08-06 14:34:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195122842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:38,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248880372] [2021-08-06 14:34:38,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:34:38,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:38,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:38,280 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) [2021-08-06 14:34:38,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 14:34:40,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:40,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:40,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:34:40,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 105 [2021-08-06 14:34:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:41,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248880372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:41,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:41,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:41,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619571175] [2021-08-06 14:34:41,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:41,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:41,432 INFO L87 Difference]: Start difference. First operand 433 states and 1342 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:34:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:42,175 INFO L93 Difference]: Finished difference Result 616 states and 1803 transitions. [2021-08-06 14:34:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:34:42,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 19 [2021-08-06 14:34:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:42,177 INFO L225 Difference]: With dead ends: 616 [2021-08-06 14:34:42,177 INFO L226 Difference]: Without dead ends: 601 [2021-08-06 14:34:42,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 819.9ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:34:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-06 14:34:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-08-06 14:34:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0934579439252334) internal successors, (1324), 428 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1324 transitions. [2021-08-06 14:34:42,182 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1324 transitions. Word has length 19 [2021-08-06 14:34:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:42,182 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1324 transitions. [2021-08-06 14:34:42,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:34:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1324 transitions. [2021-08-06 14:34:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:42,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:42,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:42,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:42,383 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,SelfDestructingSolverStorable210 [2021-08-06 14:34:42,383 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:42,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1642534812, now seen corresponding path program 30 times [2021-08-06 14:34:42,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:42,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660292898] [2021-08-06 14:34:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:42,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:42,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:42,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660292898] [2021-08-06 14:34:42,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660292898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:42,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740884688] [2021-08-06 14:34:42,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:34:42,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:42,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:42,624 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) [2021-08-06 14:34:42,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 14:34:44,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:34:44,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:44,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:34:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:45,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-06 14:34:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:46,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740884688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:46,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:46,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:46,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689006842] [2021-08-06 14:34:46,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:46,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:46,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:46,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:46,082 INFO L87 Difference]: Start difference. First operand 429 states and 1324 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) [2021-08-06 14:34:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:46,857 INFO L93 Difference]: Finished difference Result 647 states and 1868 transitions. [2021-08-06 14:34:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:34:46,857 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 19 [2021-08-06 14:34:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:46,858 INFO L225 Difference]: With dead ends: 647 [2021-08-06 14:34:46,858 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 14:34:46,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 867.9ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:34:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 14:34:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 438. [2021-08-06 14:34:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.1075514874141876) internal successors, (1358), 437 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) [2021-08-06 14:34:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1358 transitions. [2021-08-06 14:34:46,863 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1358 transitions. Word has length 19 [2021-08-06 14:34:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:46,863 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1358 transitions. [2021-08-06 14:34:46,863 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) [2021-08-06 14:34:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1358 transitions. [2021-08-06 14:34:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:46,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:46,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:46,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:47,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-06 14:34:47,065 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1911535150, now seen corresponding path program 31 times [2021-08-06 14:34:47,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:47,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477954601] [2021-08-06 14:34:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:47,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:47,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:47,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477954601] [2021-08-06 14:34:47,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477954601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:47,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654802199] [2021-08-06 14:34:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:34:47,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:47,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:47,364 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) [2021-08-06 14:34:47,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 14:34:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:34:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 136 [2021-08-06 14:34:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:50,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654802199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:50,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:50,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:50,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901300343] [2021-08-06 14:34:50,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:50,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:50,865 INFO L87 Difference]: Start difference. First operand 438 states and 1358 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) [2021-08-06 14:34:52,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:52,649 INFO L93 Difference]: Finished difference Result 861 states and 2358 transitions. [2021-08-06 14:34:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:34:52,649 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 19 [2021-08-06 14:34:52,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:52,651 INFO L225 Difference]: With dead ends: 861 [2021-08-06 14:34:52,651 INFO L226 Difference]: Without dead ends: 768 [2021-08-06 14:34:52,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1859.9ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:34:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-08-06 14:34:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 449. [2021-08-06 14:34:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1294642857142856) internal successors, (1402), 448 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1402 transitions. [2021-08-06 14:34:52,657 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1402 transitions. Word has length 19 [2021-08-06 14:34:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:52,657 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1402 transitions. [2021-08-06 14:34:52,657 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) [2021-08-06 14:34:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1402 transitions. [2021-08-06 14:34:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:52,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:52,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:52,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:52,858 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,SelfDestructingSolverStorable212 [2021-08-06 14:34:52,859 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:52,859 INFO L82 PathProgramCache]: Analyzing trace with hash -927909846, now seen corresponding path program 32 times [2021-08-06 14:34:52,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:52,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549130131] [2021-08-06 14:34:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:52,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:53,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:53,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549130131] [2021-08-06 14:34:53,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549130131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:53,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561586335] [2021-08-06 14:34:53,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:34:53,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:53,155 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) [2021-08-06 14:34:53,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 14:34:55,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:55,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:34:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:55,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:34:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:56,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561586335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:56,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:56,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:34:56,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137819533] [2021-08-06 14:34:56,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:56,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:56,506 INFO L87 Difference]: Start difference. First operand 449 states and 1402 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:57,821 INFO L93 Difference]: Finished difference Result 678 states and 1951 transitions. [2021-08-06 14:34:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:34:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:34:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:57,823 INFO L225 Difference]: With dead ends: 678 [2021-08-06 14:34:57,823 INFO L226 Difference]: Without dead ends: 636 [2021-08-06 14:34:57,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1363.6ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:34:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-06 14:34:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 449. [2021-08-06 14:34:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.125) internal successors, (1400), 448 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1400 transitions. [2021-08-06 14:34:57,831 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1400 transitions. Word has length 19 [2021-08-06 14:34:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:57,831 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1400 transitions. [2021-08-06 14:34:57,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1400 transitions. [2021-08-06 14:34:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:34:57,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:57,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:57,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:58,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-06 14:34:58,037 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash 453505652, now seen corresponding path program 33 times [2021-08-06 14:34:58,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:58,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061581382] [2021-08-06 14:34:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:58,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:58,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:58,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061581382] [2021-08-06 14:34:58,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061581382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:58,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388582962] [2021-08-06 14:34:58,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:58,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:58,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:58,281 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) [2021-08-06 14:34:58,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 14:35:00,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:35:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:00,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:35:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:01,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:35:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:01,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388582962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:01,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:01,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:01,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394765566] [2021-08-06 14:35:01,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:01,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:01,555 INFO L87 Difference]: Start difference. First operand 449 states and 1400 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) [2021-08-06 14:35:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:02,205 INFO L93 Difference]: Finished difference Result 617 states and 1827 transitions. [2021-08-06 14:35:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:35:02,205 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 19 [2021-08-06 14:35:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:02,207 INFO L225 Difference]: With dead ends: 617 [2021-08-06 14:35:02,207 INFO L226 Difference]: Without dead ends: 588 [2021-08-06 14:35:02,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:35:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-08-06 14:35:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 459. [2021-08-06 14:35:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1200873362445414) internal successors, (1429), 458 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1429 transitions. [2021-08-06 14:35:02,214 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1429 transitions. Word has length 19 [2021-08-06 14:35:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:02,214 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1429 transitions. [2021-08-06 14:35:02,214 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) [2021-08-06 14:35:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1429 transitions. [2021-08-06 14:35:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:02,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:02,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:02,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 14:35:02,434 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,SelfDestructingSolverStorable214 [2021-08-06 14:35:02,434 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:02,435 INFO L82 PathProgramCache]: Analyzing trace with hash 104448450, now seen corresponding path program 34 times [2021-08-06 14:35:02,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:02,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737373169] [2021-08-06 14:35:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:02,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:02,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:02,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737373169] [2021-08-06 14:35:02,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737373169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:02,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964166277] [2021-08-06 14:35:02,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:35:02,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:02,652 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) [2021-08-06 14:35:02,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 14:35:05,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:35:05,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:05,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:35:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:05,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-06 14:35:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964166277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:06,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:06,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:06,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035278150] [2021-08-06 14:35:06,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:06,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:06,105 INFO L87 Difference]: Start difference. First operand 459 states and 1429 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) [2021-08-06 14:35:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:06,891 INFO L93 Difference]: Finished difference Result 641 states and 1875 transitions. [2021-08-06 14:35:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:35:06,891 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 19 [2021-08-06 14:35:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:06,892 INFO L225 Difference]: With dead ends: 641 [2021-08-06 14:35:06,892 INFO L226 Difference]: Without dead ends: 591 [2021-08-06 14:35:06,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:35:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-06 14:35:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 456. [2021-08-06 14:35:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.123076923076923) internal successors, (1421), 455 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1421 transitions. [2021-08-06 14:35:06,898 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1421 transitions. Word has length 19 [2021-08-06 14:35:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:06,898 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1421 transitions. [2021-08-06 14:35:06,898 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) [2021-08-06 14:35:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1421 transitions. [2021-08-06 14:35:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:06,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:06,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:06,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:07,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-06 14:35:07,099 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:07,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2041722310, now seen corresponding path program 35 times [2021-08-06 14:35:07,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:07,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286718613] [2021-08-06 14:35:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:07,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:07,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:07,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286718613] [2021-08-06 14:35:07,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286718613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:07,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500717636] [2021-08-06 14:35:07,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:35:07,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:07,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:07,355 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) [2021-08-06 14:35:07,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 14:35:09,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:35:09,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:35:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:10,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:35:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:10,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500717636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:10,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:10,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:10,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340007752] [2021-08-06 14:35:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:10,658 INFO L87 Difference]: Start difference. First operand 456 states and 1421 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) [2021-08-06 14:35:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:12,153 INFO L93 Difference]: Finished difference Result 790 states and 2234 transitions. [2021-08-06 14:35:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:35:12,153 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 19 [2021-08-06 14:35:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:12,154 INFO L225 Difference]: With dead ends: 790 [2021-08-06 14:35:12,154 INFO L226 Difference]: Without dead ends: 745 [2021-08-06 14:35:12,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1467.4ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:35:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-08-06 14:35:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 453. [2021-08-06 14:35:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1261061946902653) internal successors, (1413), 452 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1413 transitions. [2021-08-06 14:35:12,160 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1413 transitions. Word has length 19 [2021-08-06 14:35:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:12,160 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1413 transitions. [2021-08-06 14:35:12,160 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) [2021-08-06 14:35:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1413 transitions. [2021-08-06 14:35:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:12,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:12,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:12,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:12,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:12,362 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1453976988, now seen corresponding path program 36 times [2021-08-06 14:35:12,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:12,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110493145] [2021-08-06 14:35:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:12,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:12,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:12,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110493145] [2021-08-06 14:35:12,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110493145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:12,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926432898] [2021-08-06 14:35:12,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:35:12,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:12,621 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) [2021-08-06 14:35:12,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 14:35:15,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:35:15,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:15,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:35:15,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:15,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 116 [2021-08-06 14:35:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:16,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926432898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:16,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:16,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:16,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743482906] [2021-08-06 14:35:16,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:16,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:16,067 INFO L87 Difference]: Start difference. First operand 453 states and 1413 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) [2021-08-06 14:35:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:17,607 INFO L93 Difference]: Finished difference Result 885 states and 2503 transitions. [2021-08-06 14:35:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:35:17,608 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 19 [2021-08-06 14:35:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:17,609 INFO L225 Difference]: With dead ends: 885 [2021-08-06 14:35:17,609 INFO L226 Difference]: Without dead ends: 835 [2021-08-06 14:35:17,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1594.2ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:35:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-08-06 14:35:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 468. [2021-08-06 14:35:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1241970021413277) internal successors, (1459), 467 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1459 transitions. [2021-08-06 14:35:17,616 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1459 transitions. Word has length 19 [2021-08-06 14:35:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:17,616 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1459 transitions. [2021-08-06 14:35:17,616 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) [2021-08-06 14:35:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1459 transitions. [2021-08-06 14:35:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:17,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:17,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:17,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 14:35:17,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:17,817 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1800120244, now seen corresponding path program 37 times [2021-08-06 14:35:17,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:17,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405114131] [2021-08-06 14:35:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:17,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:18,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:18,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405114131] [2021-08-06 14:35:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405114131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:18,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259179213] [2021-08-06 14:35:18,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:35:18,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:18,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:18,027 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) [2021-08-06 14:35:18,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 14:35:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:35:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:21,289 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 132 treesize of output 106 [2021-08-06 14:35:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:21,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259179213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:21,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:21,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:21,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498729310] [2021-08-06 14:35:21,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:21,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:21,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:21,481 INFO L87 Difference]: Start difference. First operand 468 states and 1459 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) [2021-08-06 14:35:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:22,355 INFO L93 Difference]: Finished difference Result 657 states and 1931 transitions. [2021-08-06 14:35:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:35:22,355 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 19 [2021-08-06 14:35:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:22,356 INFO L225 Difference]: With dead ends: 657 [2021-08-06 14:35:22,356 INFO L226 Difference]: Without dead ends: 613 [2021-08-06 14:35:22,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 901.0ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:35:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-06 14:35:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 475. [2021-08-06 14:35:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1244725738396624) internal successors, (1481), 474 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-08-06 14:35:22,362 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 19 [2021-08-06 14:35:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:22,362 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-08-06 14:35:22,362 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) [2021-08-06 14:35:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-08-06 14:35:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:22,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:22,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:22,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:22,563 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2145789850, now seen corresponding path program 38 times [2021-08-06 14:35:22,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:22,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763759366] [2021-08-06 14:35:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:22,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:22,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:22,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763759366] [2021-08-06 14:35:22,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763759366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:22,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264347851] [2021-08-06 14:35:22,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:35:22,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:22,777 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) [2021-08-06 14:35:22,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 14:35:25,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:35:25,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:25,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:35:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:25,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:35:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:26,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264347851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:26,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:26,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:26,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477645348] [2021-08-06 14:35:26,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:26,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:26,267 INFO L87 Difference]: Start difference. First operand 475 states and 1481 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) [2021-08-06 14:35:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:27,225 INFO L93 Difference]: Finished difference Result 649 states and 1913 transitions. [2021-08-06 14:35:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:35:27,226 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 19 [2021-08-06 14:35:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:27,227 INFO L225 Difference]: With dead ends: 649 [2021-08-06 14:35:27,227 INFO L226 Difference]: Without dead ends: 605 [2021-08-06 14:35:27,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:35:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-06 14:35:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 475. [2021-08-06 14:35:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1244725738396624) internal successors, (1481), 474 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-08-06 14:35:27,232 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 19 [2021-08-06 14:35:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:27,232 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-08-06 14:35:27,232 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) [2021-08-06 14:35:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-08-06 14:35:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:27,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:27,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:27,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 14:35:27,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:27,433 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash -380910, now seen corresponding path program 39 times [2021-08-06 14:35:27,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:27,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14526122] [2021-08-06 14:35:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:27,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:27,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:27,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14526122] [2021-08-06 14:35:27,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14526122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:27,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142068421] [2021-08-06 14:35:27,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:35:27,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:27,685 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) [2021-08-06 14:35:27,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:35:30,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:35:30,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:30,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:35:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:30,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:35:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142068421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:31,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:31,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:31,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494951715] [2021-08-06 14:35:31,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:31,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:31,225 INFO L87 Difference]: Start difference. First operand 475 states and 1481 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) [2021-08-06 14:35:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:32,512 INFO L93 Difference]: Finished difference Result 752 states and 2158 transitions. [2021-08-06 14:35:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:35:32,513 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 19 [2021-08-06 14:35:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:32,514 INFO L225 Difference]: With dead ends: 752 [2021-08-06 14:35:32,514 INFO L226 Difference]: Without dead ends: 707 [2021-08-06 14:35:32,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1230.0ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:35:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-06 14:35:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 475. [2021-08-06 14:35:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1244725738396624) internal successors, (1481), 474 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-08-06 14:35:32,521 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 19 [2021-08-06 14:35:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:32,521 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-08-06 14:35:32,521 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) [2021-08-06 14:35:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-08-06 14:35:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:32,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:32,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:32,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:32,723 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,SelfDestructingSolverStorable220 [2021-08-06 14:35:32,723 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash -307139370, now seen corresponding path program 40 times [2021-08-06 14:35:32,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:32,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252931256] [2021-08-06 14:35:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:32,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:32,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:32,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252931256] [2021-08-06 14:35:32,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252931256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:32,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478999196] [2021-08-06 14:35:32,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:35:32,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:32,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:32,955 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) [2021-08-06 14:35:32,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:35:35,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:35:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:35:35,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:36,649 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 138 treesize of output 110 [2021-08-06 14:35:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:36,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478999196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:36,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:36,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:36,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426708734] [2021-08-06 14:35:36,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:36,826 INFO L87 Difference]: Start difference. First operand 475 states and 1481 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) [2021-08-06 14:35:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:37,459 INFO L93 Difference]: Finished difference Result 624 states and 1852 transitions. [2021-08-06 14:35:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:35:37,459 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 19 [2021-08-06 14:35:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:37,460 INFO L225 Difference]: With dead ends: 624 [2021-08-06 14:35:37,460 INFO L226 Difference]: Without dead ends: 595 [2021-08-06 14:35:37,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:35:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-06 14:35:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 479. [2021-08-06 14:35:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1276150627615062) internal successors, (1495), 478 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1495 transitions. [2021-08-06 14:35:37,466 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1495 transitions. Word has length 19 [2021-08-06 14:35:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:37,466 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1495 transitions. [2021-08-06 14:35:37,466 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) [2021-08-06 14:35:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1495 transitions. [2021-08-06 14:35:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:37,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:37,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:37,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:37,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-06 14:35:37,667 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:37,668 INFO L82 PathProgramCache]: Analyzing trace with hash -656196572, now seen corresponding path program 41 times [2021-08-06 14:35:37,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:37,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632388344] [2021-08-06 14:35:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:37,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:37,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:37,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632388344] [2021-08-06 14:35:37,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632388344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:37,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792762566] [2021-08-06 14:35:37,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:35:37,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:37,899 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) [2021-08-06 14:35:37,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:35:40,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:35:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:40,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:35:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:41,528 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 163 treesize of output 129 [2021-08-06 14:35:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:41,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792762566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:41,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:41,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:41,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898524051] [2021-08-06 14:35:41,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:41,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:41,861 INFO L87 Difference]: Start difference. First operand 479 states and 1495 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) [2021-08-06 14:35:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:42,788 INFO L93 Difference]: Finished difference Result 705 states and 2035 transitions. [2021-08-06 14:35:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:35:42,789 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 19 [2021-08-06 14:35:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:42,790 INFO L225 Difference]: With dead ends: 705 [2021-08-06 14:35:42,790 INFO L226 Difference]: Without dead ends: 661 [2021-08-06 14:35:42,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1014.9ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:35:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-06 14:35:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 476. [2021-08-06 14:35:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.130526315789474) internal successors, (1487), 475 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1487 transitions. [2021-08-06 14:35:42,796 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1487 transitions. Word has length 19 [2021-08-06 14:35:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:42,796 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1487 transitions. [2021-08-06 14:35:42,796 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) [2021-08-06 14:35:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1487 transitions. [2021-08-06 14:35:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:42,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:42,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:42,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 14:35:42,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:42,997 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1924672150, now seen corresponding path program 42 times [2021-08-06 14:35:42,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:42,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043705725] [2021-08-06 14:35:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:42,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:43,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:43,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043705725] [2021-08-06 14:35:43,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043705725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:43,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435280895] [2021-08-06 14:35:43,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:35:43,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:43,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:43,233 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) [2021-08-06 14:35:43,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:35:46,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:35:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:35:46,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:46,945 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 160 treesize of output 128 [2021-08-06 14:35:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:47,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435280895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:47,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:47,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:47,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242733651] [2021-08-06 14:35:47,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:47,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:47,157 INFO L87 Difference]: Start difference. First operand 476 states and 1487 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) [2021-08-06 14:35:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:48,101 INFO L93 Difference]: Finished difference Result 626 states and 1858 transitions. [2021-08-06 14:35:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:35:48,102 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 19 [2021-08-06 14:35:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:48,103 INFO L225 Difference]: With dead ends: 626 [2021-08-06 14:35:48,103 INFO L226 Difference]: Without dead ends: 597 [2021-08-06 14:35:48,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 967.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:35:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-08-06 14:35:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 478. [2021-08-06 14:35:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1320754716981134) internal successors, (1494), 477 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1494 transitions. [2021-08-06 14:35:48,108 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1494 transitions. Word has length 19 [2021-08-06 14:35:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:48,109 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1494 transitions. [2021-08-06 14:35:48,109 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) [2021-08-06 14:35:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1494 transitions. [2021-08-06 14:35:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:48,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:48,109 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:48,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:48,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-06 14:35:48,310 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash 678876434, now seen corresponding path program 43 times [2021-08-06 14:35:48,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:48,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167228411] [2021-08-06 14:35:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:48,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:48,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167228411] [2021-08-06 14:35:48,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167228411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:48,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118458528] [2021-08-06 14:35:48,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:35:48,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:48,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:48,559 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) [2021-08-06 14:35:48,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:35:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:51,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:35:51,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:52,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 130 [2021-08-06 14:35:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:52,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118458528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:52,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:52,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:52,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535256934] [2021-08-06 14:35:52,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:52,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:52,729 INFO L87 Difference]: Start difference. First operand 478 states and 1494 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) [2021-08-06 14:35:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:53,564 INFO L93 Difference]: Finished difference Result 616 states and 1838 transitions. [2021-08-06 14:35:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:35:53,564 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 19 [2021-08-06 14:35:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:53,565 INFO L225 Difference]: With dead ends: 616 [2021-08-06 14:35:53,565 INFO L226 Difference]: Without dead ends: 594 [2021-08-06 14:35:53,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:35:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-06 14:35:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 480. [2021-08-06 14:35:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1336116910229643) internal successors, (1501), 479 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1501 transitions. [2021-08-06 14:35:53,572 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1501 transitions. Word has length 19 [2021-08-06 14:35:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:53,572 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1501 transitions. [2021-08-06 14:35:53,572 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) [2021-08-06 14:35:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1501 transitions. [2021-08-06 14:35:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:53,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:53,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:53,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:53,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-06 14:35:53,777 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash -759085102, now seen corresponding path program 44 times [2021-08-06 14:35:53,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:53,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399948595] [2021-08-06 14:35:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:53,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:54,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:54,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399948595] [2021-08-06 14:35:54,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399948595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:54,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698083150] [2021-08-06 14:35:54,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:35:54,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:54,054 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) [2021-08-06 14:35:54,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:35:57,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:35:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:35:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:57,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:35:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698083150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:58,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:58,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:35:58,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785733782] [2021-08-06 14:35:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:58,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:58,223 INFO L87 Difference]: Start difference. First operand 480 states and 1501 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) [2021-08-06 14:35:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:59,075 INFO L93 Difference]: Finished difference Result 676 states and 2007 transitions. [2021-08-06 14:35:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:35:59,076 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 19 [2021-08-06 14:35:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:59,077 INFO L225 Difference]: With dead ends: 676 [2021-08-06 14:35:59,077 INFO L226 Difference]: Without dead ends: 661 [2021-08-06 14:35:59,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:35:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-06 14:35:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 485. [2021-08-06 14:35:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.1508264462809916) internal successors, (1525), 484 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1525 transitions. [2021-08-06 14:35:59,084 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1525 transitions. Word has length 19 [2021-08-06 14:35:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:59,084 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1525 transitions. [2021-08-06 14:35:59,084 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) [2021-08-06 14:35:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1525 transitions. [2021-08-06 14:35:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:35:59,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:59,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:59,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:59,312 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,SelfDestructingSolverStorable225 [2021-08-06 14:35:59,313 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash 235290518, now seen corresponding path program 45 times [2021-08-06 14:35:59,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:59,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045089570] [2021-08-06 14:35:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:59,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:59,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:59,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045089570] [2021-08-06 14:35:59,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045089570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:59,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401651960] [2021-08-06 14:35:59,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:35:59,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:59,557 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) [2021-08-06 14:35:59,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:36:02,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:36:02,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:02,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:36:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:03,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:36:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:03,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401651960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:03,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:03,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:03,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460539802] [2021-08-06 14:36:03,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:03,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:03,755 INFO L87 Difference]: Start difference. First operand 485 states and 1525 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:36:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:04,753 INFO L93 Difference]: Finished difference Result 653 states and 1942 transitions. [2021-08-06 14:36:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:36:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 19 [2021-08-06 14:36:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:04,754 INFO L225 Difference]: With dead ends: 653 [2021-08-06 14:36:04,754 INFO L226 Difference]: Without dead ends: 638 [2021-08-06 14:36:04,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1029.8ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:36:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-06 14:36:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 480. [2021-08-06 14:36:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1336116910229643) internal successors, (1501), 479 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1501 transitions. [2021-08-06 14:36:04,761 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1501 transitions. Word has length 19 [2021-08-06 14:36:04,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:04,761 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1501 transitions. [2021-08-06 14:36:04,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:36:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1501 transitions. [2021-08-06 14:36:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:04,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:04,763 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:04,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:04,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:04,978 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1105041956, now seen corresponding path program 46 times [2021-08-06 14:36:04,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:04,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394183682] [2021-08-06 14:36:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:04,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:05,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:05,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394183682] [2021-08-06 14:36:05,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394183682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:05,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445662030] [2021-08-06 14:36:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:36:05,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:05,333 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) [2021-08-06 14:36:05,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:36:08,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:36:08,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:36:08,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:09,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-06 14:36:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445662030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:09,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:09,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:09,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584874024] [2021-08-06 14:36:09,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:09,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:09,783 INFO L87 Difference]: Start difference. First operand 480 states and 1501 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) [2021-08-06 14:36:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:10,600 INFO L93 Difference]: Finished difference Result 702 states and 2053 transitions. [2021-08-06 14:36:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:36:10,600 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 19 [2021-08-06 14:36:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:10,602 INFO L225 Difference]: With dead ends: 702 [2021-08-06 14:36:10,602 INFO L226 Difference]: Without dead ends: 659 [2021-08-06 14:36:10,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 986.6ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:36:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-08-06 14:36:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 483. [2021-08-06 14:36:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.145228215767635) internal successors, (1516), 482 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1516 transitions. [2021-08-06 14:36:10,610 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1516 transitions. Word has length 19 [2021-08-06 14:36:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:10,610 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1516 transitions. [2021-08-06 14:36:10,611 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) [2021-08-06 14:36:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1516 transitions. [2021-08-06 14:36:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:10,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:10,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:10,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:10,836 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,SelfDestructingSolverStorable227 [2021-08-06 14:36:10,837 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1845939290, now seen corresponding path program 47 times [2021-08-06 14:36:10,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:10,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438690449] [2021-08-06 14:36:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:10,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:11,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:11,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438690449] [2021-08-06 14:36:11,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438690449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:11,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047045059] [2021-08-06 14:36:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:36:11,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:11,108 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) [2021-08-06 14:36:11,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:36:14,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:36:14,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:36:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:36:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:15,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047045059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:15,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:15,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:15,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905930062] [2021-08-06 14:36:15,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:15,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:15,387 INFO L87 Difference]: Start difference. First operand 483 states and 1516 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) [2021-08-06 14:36:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:16,867 INFO L93 Difference]: Finished difference Result 774 states and 2232 transitions. [2021-08-06 14:36:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:36:16,867 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 19 [2021-08-06 14:36:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:16,868 INFO L225 Difference]: With dead ends: 774 [2021-08-06 14:36:16,868 INFO L226 Difference]: Without dead ends: 709 [2021-08-06 14:36:16,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:36:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-06 14:36:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 486. [2021-08-06 14:36:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.156701030927835) internal successors, (1531), 485 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1531 transitions. [2021-08-06 14:36:16,875 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1531 transitions. Word has length 19 [2021-08-06 14:36:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:16,875 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1531 transitions. [2021-08-06 14:36:16,875 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) [2021-08-06 14:36:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1531 transitions. [2021-08-06 14:36:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:16,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:16,876 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:16,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 14:36:17,076 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,SelfDestructingSolverStorable228 [2021-08-06 14:36:17,076 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1465402702, now seen corresponding path program 48 times [2021-08-06 14:36:17,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:17,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789783016] [2021-08-06 14:36:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:17,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:17,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:17,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789783016] [2021-08-06 14:36:17,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789783016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:17,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668358877] [2021-08-06 14:36:17,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:36:17,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:17,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:17,367 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) [2021-08-06 14:36:17,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:36:20,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:36:20,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:36:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:21,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:36:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:21,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668358877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:21,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:21,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:21,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008296835] [2021-08-06 14:36:21,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:21,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:21,827 INFO L87 Difference]: Start difference. First operand 486 states and 1531 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:23,133 INFO L93 Difference]: Finished difference Result 699 states and 2057 transitions. [2021-08-06 14:36:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:36:23,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:36:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:23,134 INFO L225 Difference]: With dead ends: 699 [2021-08-06 14:36:23,134 INFO L226 Difference]: Without dead ends: 657 [2021-08-06 14:36:23,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1356.0ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:36:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-06 14:36:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 482. [2021-08-06 14:36:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1455301455301456) internal successors, (1513), 481 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1513 transitions. [2021-08-06 14:36:23,140 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1513 transitions. Word has length 19 [2021-08-06 14:36:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:23,140 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1513 transitions. [2021-08-06 14:36:23,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1513 transitions. [2021-08-06 14:36:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:23,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:23,141 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:23,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:23,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:23,342 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:23,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1545606510, now seen corresponding path program 49 times [2021-08-06 14:36:23,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:23,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359488613] [2021-08-06 14:36:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:23,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:23,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:23,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359488613] [2021-08-06 14:36:23,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359488613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:23,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754605738] [2021-08-06 14:36:23,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:36:23,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:23,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:23,626 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) [2021-08-06 14:36:23,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:36:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:36:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:27,771 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 163 treesize of output 129 [2021-08-06 14:36:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:28,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754605738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:28,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:28,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:28,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634562935] [2021-08-06 14:36:28,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:28,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:28,170 INFO L87 Difference]: Start difference. First operand 482 states and 1513 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) [2021-08-06 14:36:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:29,159 INFO L93 Difference]: Finished difference Result 836 states and 2420 transitions. [2021-08-06 14:36:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:36:29,160 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 19 [2021-08-06 14:36:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:29,161 INFO L225 Difference]: With dead ends: 836 [2021-08-06 14:36:29,161 INFO L226 Difference]: Without dead ends: 787 [2021-08-06 14:36:29,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1114.8ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:36:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-08-06 14:36:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 494. [2021-08-06 14:36:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.154158215010142) internal successors, (1555), 493 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1555 transitions. [2021-08-06 14:36:29,168 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1555 transitions. Word has length 19 [2021-08-06 14:36:29,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:29,168 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1555 transitions. [2021-08-06 14:36:29,168 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) [2021-08-06 14:36:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1555 transitions. [2021-08-06 14:36:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:29,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:29,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:29,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:29,369 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,SelfDestructingSolverStorable230 [2021-08-06 14:36:29,369 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash 44263866, now seen corresponding path program 50 times [2021-08-06 14:36:29,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:29,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394255471] [2021-08-06 14:36:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:29,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:29,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:29,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394255471] [2021-08-06 14:36:29,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394255471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:29,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224751694] [2021-08-06 14:36:29,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:36:29,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:29,642 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) [2021-08-06 14:36:29,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:36:33,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:36:33,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:36:33,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:33,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-06 14:36:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:34,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224751694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:34,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:34,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:34,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534265681] [2021-08-06 14:36:34,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:34,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:34,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:34,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:34,358 INFO L87 Difference]: Start difference. First operand 494 states and 1555 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) [2021-08-06 14:36:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:35,354 INFO L93 Difference]: Finished difference Result 793 states and 2319 transitions. [2021-08-06 14:36:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:36:35,354 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 19 [2021-08-06 14:36:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:35,356 INFO L225 Difference]: With dead ends: 793 [2021-08-06 14:36:35,356 INFO L226 Difference]: Without dead ends: 744 [2021-08-06 14:36:35,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1140.4ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:36:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-06 14:36:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 497. [2021-08-06 14:36:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1653225806451615) internal successors, (1570), 496 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1570 transitions. [2021-08-06 14:36:35,363 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1570 transitions. Word has length 19 [2021-08-06 14:36:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:35,363 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1570 transitions. [2021-08-06 14:36:35,363 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) [2021-08-06 14:36:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1570 transitions. [2021-08-06 14:36:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:35,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:35,364 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:35,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 14:36:35,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:35,564 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash 785161200, now seen corresponding path program 51 times [2021-08-06 14:36:35,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:35,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338509534] [2021-08-06 14:36:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:35,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:35,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:35,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338509534] [2021-08-06 14:36:35,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338509534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:35,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967705817] [2021-08-06 14:36:35,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:36:35,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:35,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:35,854 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) [2021-08-06 14:36:35,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:36:39,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:36:39,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:39,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:36:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:40,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 115 [2021-08-06 14:36:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:40,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967705817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:40,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:40,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:40,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174909358] [2021-08-06 14:36:40,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:40,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:40,548 INFO L87 Difference]: Start difference. First operand 497 states and 1570 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) [2021-08-06 14:36:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:41,886 INFO L93 Difference]: Finished difference Result 881 states and 2572 transitions. [2021-08-06 14:36:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:36:41,886 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 19 [2021-08-06 14:36:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:41,887 INFO L225 Difference]: With dead ends: 881 [2021-08-06 14:36:41,887 INFO L226 Difference]: Without dead ends: 851 [2021-08-06 14:36:41,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1441.1ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:36:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-08-06 14:36:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 504. [2021-08-06 14:36:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.190854870775348) internal successors, (1605), 503 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1605 transitions. [2021-08-06 14:36:41,895 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1605 transitions. Word has length 19 [2021-08-06 14:36:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:41,895 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1605 transitions. [2021-08-06 14:36:41,895 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) [2021-08-06 14:36:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1605 transitions. [2021-08-06 14:36:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:41,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:41,896 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:41,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:42,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:42,097 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1779536820, now seen corresponding path program 52 times [2021-08-06 14:36:42,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:42,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208688200] [2021-08-06 14:36:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:42,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:42,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:42,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208688200] [2021-08-06 14:36:42,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208688200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:42,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644521179] [2021-08-06 14:36:42,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:36:42,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:42,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:42,373 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) [2021-08-06 14:36:42,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:36:45,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:36:45,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:36:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:46,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 149 [2021-08-06 14:36:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:47,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644521179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:47,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:47,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:47,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781483160] [2021-08-06 14:36:47,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:47,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:47,391 INFO L87 Difference]: Start difference. First operand 504 states and 1605 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:36:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:49,985 INFO L93 Difference]: Finished difference Result 914 states and 2659 transitions. [2021-08-06 14:36:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:36:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 19 [2021-08-06 14:36:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:49,986 INFO L225 Difference]: With dead ends: 914 [2021-08-06 14:36:49,986 INFO L226 Difference]: Without dead ends: 877 [2021-08-06 14:36:49,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2627.9ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:36:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-08-06 14:36:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 504. [2021-08-06 14:36:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.190854870775348) internal successors, (1605), 503 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1605 transitions. [2021-08-06 14:36:50,004 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1605 transitions. Word has length 19 [2021-08-06 14:36:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:50,004 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1605 transitions. [2021-08-06 14:36:50,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:36:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1605 transitions. [2021-08-06 14:36:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:50,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:50,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:50,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 14:36:50,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-06 14:36:50,205 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1511077430, now seen corresponding path program 53 times [2021-08-06 14:36:50,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:50,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223729762] [2021-08-06 14:36:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:50,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:50,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:50,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223729762] [2021-08-06 14:36:50,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223729762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:50,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598054215] [2021-08-06 14:36:50,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:36:50,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:50,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:50,472 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) [2021-08-06 14:36:50,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:36:54,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:36:54,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:54,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:36:54,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 154 [2021-08-06 14:36:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:55,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598054215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:55,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:55,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:36:55,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701300808] [2021-08-06 14:36:55,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:55,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:55,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:55,475 INFO L87 Difference]: Start difference. First operand 504 states and 1605 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:57,454 INFO L93 Difference]: Finished difference Result 910 states and 2640 transitions. [2021-08-06 14:36:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:36:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:36:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:57,456 INFO L225 Difference]: With dead ends: 910 [2021-08-06 14:36:57,456 INFO L226 Difference]: Without dead ends: 874 [2021-08-06 14:36:57,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2058.6ms TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:36:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-08-06 14:36:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 512. [2021-08-06 14:36:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.207436399217221) internal successors, (1639), 511 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1639 transitions. [2021-08-06 14:36:57,464 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1639 transitions. Word has length 19 [2021-08-06 14:36:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:57,464 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1639 transitions. [2021-08-06 14:36:57,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1639 transitions. [2021-08-06 14:36:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:36:57,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:57,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:57,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:57,665 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,SelfDestructingSolverStorable234 [2021-08-06 14:36:57,665 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash 248975510, now seen corresponding path program 54 times [2021-08-06 14:36:57,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:57,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67520393] [2021-08-06 14:36:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:57,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:57,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:57,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67520393] [2021-08-06 14:36:57,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67520393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:57,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897534875] [2021-08-06 14:36:57,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:36:57,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:57,902 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) [2021-08-06 14:36:57,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:37:01,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:37:01,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:37:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:02,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 127 [2021-08-06 14:37:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:02,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897534875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:02,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:02,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:02,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833679538] [2021-08-06 14:37:02,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:02,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:02,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:02,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:02,658 INFO L87 Difference]: Start difference. First operand 512 states and 1639 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:05,252 INFO L93 Difference]: Finished difference Result 846 states and 2471 transitions. [2021-08-06 14:37:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:37:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:37:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:05,254 INFO L225 Difference]: With dead ends: 846 [2021-08-06 14:37:05,254 INFO L226 Difference]: Without dead ends: 798 [2021-08-06 14:37:05,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2515.0ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:37:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-08-06 14:37:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 506. [2021-08-06 14:37:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.196039603960396) internal successors, (1614), 505 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1614 transitions. [2021-08-06 14:37:05,261 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1614 transitions. Word has length 19 [2021-08-06 14:37:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:05,261 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1614 transitions. [2021-08-06 14:37:05,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1614 transitions. [2021-08-06 14:37:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:05,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:05,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:05,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:05,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-06 14:37:05,463 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash -383239244, now seen corresponding path program 55 times [2021-08-06 14:37:05,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:05,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205710238] [2021-08-06 14:37:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:05,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:05,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:05,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205710238] [2021-08-06 14:37:05,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205710238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:05,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262358577] [2021-08-06 14:37:05,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:37:05,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:05,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:05,686 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) [2021-08-06 14:37:05,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:37:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:37:09,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:09,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2021-08-06 14:37:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:10,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262358577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:10,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:10,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:10,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024133475] [2021-08-06 14:37:10,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:10,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:10,133 INFO L87 Difference]: Start difference. First operand 506 states and 1614 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:10,615 INFO L93 Difference]: Finished difference Result 729 states and 2196 transitions. [2021-08-06 14:37:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:37:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:37:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:10,617 INFO L225 Difference]: With dead ends: 729 [2021-08-06 14:37:10,617 INFO L226 Difference]: Without dead ends: 714 [2021-08-06 14:37:10,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 516.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:37:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-08-06 14:37:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 516. [2021-08-06 14:37:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.1941747572815533) internal successors, (1645), 515 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1645 transitions. [2021-08-06 14:37:10,623 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1645 transitions. Word has length 19 [2021-08-06 14:37:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:10,623 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1645 transitions. [2021-08-06 14:37:10,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1645 transitions. [2021-08-06 14:37:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:10,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:10,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:10,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 14:37:10,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:10,825 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1530060728, now seen corresponding path program 56 times [2021-08-06 14:37:10,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:10,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594717180] [2021-08-06 14:37:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:10,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:11,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:11,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594717180] [2021-08-06 14:37:11,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594717180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:11,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270470246] [2021-08-06 14:37:11,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:37:11,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:11,101 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) [2021-08-06 14:37:11,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:37:14,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:37:14,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:14,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:37:14,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:15,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:37:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:15,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270470246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:15,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:15,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:15,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966903340] [2021-08-06 14:37:15,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:15,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:15,657 INFO L87 Difference]: Start difference. First operand 516 states and 1645 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:16,419 INFO L93 Difference]: Finished difference Result 762 states and 2292 transitions. [2021-08-06 14:37:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:37:16,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:37:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:16,421 INFO L225 Difference]: With dead ends: 762 [2021-08-06 14:37:16,421 INFO L226 Difference]: Without dead ends: 747 [2021-08-06 14:37:16,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 750.8ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:37:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-08-06 14:37:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 519. [2021-08-06 14:37:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.1969111969111967) internal successors, (1656), 518 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1656 transitions. [2021-08-06 14:37:16,427 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1656 transitions. Word has length 19 [2021-08-06 14:37:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:16,427 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1656 transitions. [2021-08-06 14:37:16,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1656 transitions. [2021-08-06 14:37:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:16,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:16,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:16,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 14:37:16,632 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,SelfDestructingSolverStorable237 [2021-08-06 14:37:16,633 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2036406994, now seen corresponding path program 57 times [2021-08-06 14:37:16,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:16,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793642054] [2021-08-06 14:37:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:16,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:16,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:16,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793642054] [2021-08-06 14:37:16,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793642054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:16,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678870751] [2021-08-06 14:37:16,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:37:16,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:16,851 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) [2021-08-06 14:37:16,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:37:20,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:37:20,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:20,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:37:20,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:21,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:37:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678870751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:21,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:21,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:21,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784765700] [2021-08-06 14:37:21,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:21,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:21,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:21,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:21,467 INFO L87 Difference]: Start difference. First operand 519 states and 1656 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:22,163 INFO L93 Difference]: Finished difference Result 734 states and 2219 transitions. [2021-08-06 14:37:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:37:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:37:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:22,164 INFO L225 Difference]: With dead ends: 734 [2021-08-06 14:37:22,164 INFO L226 Difference]: Without dead ends: 719 [2021-08-06 14:37:22,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:37:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-08-06 14:37:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 525. [2021-08-06 14:37:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.196564885496183) internal successors, (1675), 524 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1675 transitions. [2021-08-06 14:37:22,171 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1675 transitions. Word has length 19 [2021-08-06 14:37:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:22,171 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1675 transitions. [2021-08-06 14:37:22,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1675 transitions. [2021-08-06 14:37:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:22,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:22,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:22,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:22,372 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,SelfDestructingSolverStorable238 [2021-08-06 14:37:22,372 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1909503100, now seen corresponding path program 58 times [2021-08-06 14:37:22,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:22,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972963399] [2021-08-06 14:37:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:22,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:22,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:22,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972963399] [2021-08-06 14:37:22,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972963399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:22,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201543432] [2021-08-06 14:37:22,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:37:22,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:22,649 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) [2021-08-06 14:37:22,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:37:26,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:37:26,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:26,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:37:26,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:27,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 122 [2021-08-06 14:37:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:27,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201543432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:27,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:27,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:27,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097556084] [2021-08-06 14:37:27,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:27,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:27,445 INFO L87 Difference]: Start difference. First operand 525 states and 1675 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:28,280 INFO L93 Difference]: Finished difference Result 825 states and 2426 transitions. [2021-08-06 14:37:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:37:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:37:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:28,282 INFO L225 Difference]: With dead ends: 825 [2021-08-06 14:37:28,282 INFO L226 Difference]: Without dead ends: 767 [2021-08-06 14:37:28,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:37:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-08-06 14:37:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 531. [2021-08-06 14:37:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.20188679245283) internal successors, (1697), 530 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1697 transitions. [2021-08-06 14:37:28,289 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1697 transitions. Word has length 19 [2021-08-06 14:37:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:28,289 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1697 transitions. [2021-08-06 14:37:28,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1697 transitions. [2021-08-06 14:37:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:28,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:28,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:28,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:28,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:28,490 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash -236667660, now seen corresponding path program 59 times [2021-08-06 14:37:28,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:28,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275827548] [2021-08-06 14:37:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:28,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:28,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:28,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275827548] [2021-08-06 14:37:28,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275827548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:28,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589975218] [2021-08-06 14:37:28,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:37:28,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:28,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:28,707 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) [2021-08-06 14:37:28,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:37:32,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:37:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:37:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:33,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:37:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:33,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589975218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:33,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:33,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 14:37:33,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994313981] [2021-08-06 14:37:33,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:37:33,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:37:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:37:33,434 INFO L87 Difference]: Start difference. First operand 531 states and 1697 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) [2021-08-06 14:37:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:33,929 INFO L93 Difference]: Finished difference Result 707 states and 2179 transitions. [2021-08-06 14:37:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:37:33,929 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 19 [2021-08-06 14:37:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:33,930 INFO L225 Difference]: With dead ends: 707 [2021-08-06 14:37:33,930 INFO L226 Difference]: Without dead ends: 692 [2021-08-06 14:37:33,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:37:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-08-06 14:37:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 534. [2021-08-06 14:37:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.204502814258912) internal successors, (1708), 533 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1708 transitions. [2021-08-06 14:37:33,937 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1708 transitions. Word has length 19 [2021-08-06 14:37:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:33,937 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1708 transitions. [2021-08-06 14:37:33,937 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) [2021-08-06 14:37:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1708 transitions. [2021-08-06 14:37:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:33,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:33,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:33,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:34,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:34,138 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:34,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:34,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1345472406, now seen corresponding path program 60 times [2021-08-06 14:37:34,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:34,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653770109] [2021-08-06 14:37:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:34,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:34,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:34,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653770109] [2021-08-06 14:37:34,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653770109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:34,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026071764] [2021-08-06 14:37:34,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:37:34,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:34,391 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) [2021-08-06 14:37:34,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:37:38,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:37:38,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:38,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:37:38,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:39,052 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 167 treesize of output 133 [2021-08-06 14:37:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:39,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026071764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:39,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:39,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:39,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500355401] [2021-08-06 14:37:39,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:39,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:39,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:39,302 INFO L87 Difference]: Start difference. First operand 534 states and 1708 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:40,540 INFO L93 Difference]: Finished difference Result 949 states and 2780 transitions. [2021-08-06 14:37:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:37:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:37:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:40,542 INFO L225 Difference]: With dead ends: 949 [2021-08-06 14:37:40,542 INFO L226 Difference]: Without dead ends: 919 [2021-08-06 14:37:40,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1221.3ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:37:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-08-06 14:37:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 540. [2021-08-06 14:37:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.2133580705009277) internal successors, (1732), 539 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1732 transitions. [2021-08-06 14:37:40,549 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1732 transitions. Word has length 19 [2021-08-06 14:37:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:40,549 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1732 transitions. [2021-08-06 14:37:40,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1732 transitions. [2021-08-06 14:37:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:40,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:40,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:40,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:40,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2021-08-06 14:37:40,751 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:40,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1840701486, now seen corresponding path program 61 times [2021-08-06 14:37:40,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:40,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802975294] [2021-08-06 14:37:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:40,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:41,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:41,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802975294] [2021-08-06 14:37:41,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802975294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:41,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153825442] [2021-08-06 14:37:41,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:37:41,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:41,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:41,057 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) [2021-08-06 14:37:41,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:37:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:37:45,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:45,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 126 [2021-08-06 14:37:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153825442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:46,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:46,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:46,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257058776] [2021-08-06 14:37:46,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:46,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:46,172 INFO L87 Difference]: Start difference. First operand 540 states and 1732 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:48,218 INFO L93 Difference]: Finished difference Result 906 states and 2747 transitions. [2021-08-06 14:37:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:37:48,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:37:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:48,220 INFO L225 Difference]: With dead ends: 906 [2021-08-06 14:37:48,220 INFO L226 Difference]: Without dead ends: 862 [2021-08-06 14:37:48,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2090.7ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:37:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-08-06 14:37:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 541. [2021-08-06 14:37:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 3.2185185185185183) internal successors, (1738), 540 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1738 transitions. [2021-08-06 14:37:48,229 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1738 transitions. Word has length 19 [2021-08-06 14:37:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:48,229 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1738 transitions. [2021-08-06 14:37:48,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1738 transitions. [2021-08-06 14:37:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:48,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:48,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:48,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 14:37:48,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:48,445 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1385028344, now seen corresponding path program 62 times [2021-08-06 14:37:48,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:48,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191588176] [2021-08-06 14:37:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:48,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:48,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:48,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191588176] [2021-08-06 14:37:48,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191588176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:48,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055530774] [2021-08-06 14:37:48,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:37:48,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:48,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:48,741 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) [2021-08-06 14:37:48,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:37:52,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:37:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:37:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:53,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 132 [2021-08-06 14:37:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:53,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055530774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:53,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:53,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:37:53,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708314628] [2021-08-06 14:37:53,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:53,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:53,830 INFO L87 Difference]: Start difference. First operand 541 states and 1738 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:55,608 INFO L93 Difference]: Finished difference Result 945 states and 2804 transitions. [2021-08-06 14:37:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:37:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:37:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:55,610 INFO L225 Difference]: With dead ends: 945 [2021-08-06 14:37:55,610 INFO L226 Difference]: Without dead ends: 930 [2021-08-06 14:37:55,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1762.3ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:37:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-06 14:37:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 544. [2021-08-06 14:37:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.2246777163904237) internal successors, (1751), 543 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1751 transitions. [2021-08-06 14:37:55,618 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1751 transitions. Word has length 19 [2021-08-06 14:37:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:55,618 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1751 transitions. [2021-08-06 14:37:55,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1751 transitions. [2021-08-06 14:37:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:37:55,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:55,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:55,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:55,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-06 14:37:55,819 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:55,819 INFO L82 PathProgramCache]: Analyzing trace with hash -783434386, now seen corresponding path program 63 times [2021-08-06 14:37:55,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:55,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261940417] [2021-08-06 14:37:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:55,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:56,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:56,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261940417] [2021-08-06 14:37:56,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261940417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:56,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641114982] [2021-08-06 14:37:56,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:37:56,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:56,101 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) [2021-08-06 14:37:56,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:38:00,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:38:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:38:00,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:00,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 140 [2021-08-06 14:38:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:01,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641114982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:01,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:01,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:38:01,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003818715] [2021-08-06 14:38:01,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:01,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:01,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:01,878 INFO L87 Difference]: Start difference. First operand 544 states and 1751 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:38:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:04,850 INFO L93 Difference]: Finished difference Result 974 states and 2855 transitions. [2021-08-06 14:38:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:38:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 19 [2021-08-06 14:38:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:04,852 INFO L225 Difference]: With dead ends: 974 [2021-08-06 14:38:04,852 INFO L226 Difference]: Without dead ends: 953 [2021-08-06 14:38:04,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2982.1ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:38:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-08-06 14:38:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 546. [2021-08-06 14:38:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 3.2256880733944953) internal successors, (1758), 545 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1758 transitions. [2021-08-06 14:38:04,860 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1758 transitions. Word has length 19 [2021-08-06 14:38:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:04,860 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1758 transitions. [2021-08-06 14:38:04,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:38:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1758 transitions. [2021-08-06 14:38:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:04,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:04,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:04,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:05,061 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,SelfDestructingSolverStorable244 [2021-08-06 14:38:05,061 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash 875538046, now seen corresponding path program 64 times [2021-08-06 14:38:05,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:05,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288459849] [2021-08-06 14:38:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:05,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:05,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:05,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288459849] [2021-08-06 14:38:05,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288459849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:05,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465022743] [2021-08-06 14:38:05,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:38:05,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:05,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:05,331 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) [2021-08-06 14:38:05,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:38:09,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:38:09,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:38:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:10,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-06 14:38:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:10,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465022743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:10,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:10,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:38:10,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885843718] [2021-08-06 14:38:10,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:10,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:10,472 INFO L87 Difference]: Start difference. First operand 546 states and 1758 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:11,048 INFO L93 Difference]: Finished difference Result 747 states and 2296 transitions. [2021-08-06 14:38:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:38:11,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:38:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:11,049 INFO L225 Difference]: With dead ends: 747 [2021-08-06 14:38:11,049 INFO L226 Difference]: Without dead ends: 718 [2021-08-06 14:38:11,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:38:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-06 14:38:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 550. [2021-08-06 14:38:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.227686703096539) internal successors, (1772), 549 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1772 transitions. [2021-08-06 14:38:11,056 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1772 transitions. Word has length 19 [2021-08-06 14:38:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:11,056 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1772 transitions. [2021-08-06 14:38:11,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1772 transitions. [2021-08-06 14:38:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:11,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:11,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:11,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:11,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:11,257 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 526480844, now seen corresponding path program 65 times [2021-08-06 14:38:11,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:11,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144137895] [2021-08-06 14:38:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:11,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:11,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:11,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144137895] [2021-08-06 14:38:11,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144137895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:11,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917062875] [2021-08-06 14:38:11,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:38:11,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:11,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:11,523 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) [2021-08-06 14:38:11,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:38:15,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:38:15,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:38:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:16,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2021-08-06 14:38:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917062875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:16,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:16,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:38:16,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073979003] [2021-08-06 14:38:16,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:16,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:16,803 INFO L87 Difference]: Start difference. First operand 550 states and 1772 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:17,352 INFO L93 Difference]: Finished difference Result 737 states and 2274 transitions. [2021-08-06 14:38:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:38:17,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:38:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:17,354 INFO L225 Difference]: With dead ends: 737 [2021-08-06 14:38:17,354 INFO L226 Difference]: Without dead ends: 722 [2021-08-06 14:38:17,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:38:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-08-06 14:38:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 550. [2021-08-06 14:38:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.227686703096539) internal successors, (1772), 549 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1772 transitions. [2021-08-06 14:38:17,361 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1772 transitions. Word has length 19 [2021-08-06 14:38:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:17,361 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1772 transitions. [2021-08-06 14:38:17,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1772 transitions. [2021-08-06 14:38:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:17,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:17,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:17,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:17,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-06 14:38:17,562 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1619689916, now seen corresponding path program 66 times [2021-08-06 14:38:17,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:17,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317112080] [2021-08-06 14:38:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:17,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:17,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:17,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317112080] [2021-08-06 14:38:17,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317112080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:17,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140786530] [2021-08-06 14:38:17,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:38:17,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:17,803 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) [2021-08-06 14:38:17,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:38:22,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:38:22,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:38:22,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:22,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 152 [2021-08-06 14:38:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:23,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140786530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:23,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:23,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:38:23,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415100738] [2021-08-06 14:38:23,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:38:23,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:38:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:38:23,358 INFO L87 Difference]: Start difference. First operand 550 states and 1772 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:23,931 INFO L93 Difference]: Finished difference Result 809 states and 2446 transitions. [2021-08-06 14:38:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:38:23,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:38:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:23,932 INFO L225 Difference]: With dead ends: 809 [2021-08-06 14:38:23,933 INFO L226 Difference]: Without dead ends: 766 [2021-08-06 14:38:23,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 650.2ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:38:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-06 14:38:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 556. [2021-08-06 14:38:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.227027027027027) internal successors, (1791), 555 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1791 transitions. [2021-08-06 14:38:23,940 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1791 transitions. Word has length 19 [2021-08-06 14:38:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:23,940 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1791 transitions. [2021-08-06 14:38:23,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1791 transitions. [2021-08-06 14:38:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:23,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:23,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:23,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:24,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-08-06 14:38:24,141 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:24,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1926448376, now seen corresponding path program 67 times [2021-08-06 14:38:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:24,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071343536] [2021-08-06 14:38:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:24,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:24,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:24,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071343536] [2021-08-06 14:38:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071343536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:24,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735324538] [2021-08-06 14:38:24,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:38:24,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:24,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:24,489 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) [2021-08-06 14:38:24,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:38:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:38:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:29,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 126 [2021-08-06 14:38:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:29,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735324538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:29,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:29,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:38:29,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272652659] [2021-08-06 14:38:29,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:29,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:29,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:29,998 INFO L87 Difference]: Start difference. First operand 556 states and 1791 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:30,653 INFO L93 Difference]: Finished difference Result 788 states and 2397 transitions. [2021-08-06 14:38:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:38:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:38:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:30,655 INFO L225 Difference]: With dead ends: 788 [2021-08-06 14:38:30,655 INFO L226 Difference]: Without dead ends: 744 [2021-08-06 14:38:30,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:38:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-06 14:38:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 559. [2021-08-06 14:38:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.236559139784946) internal successors, (1806), 558 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-06 14:38:30,661 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-06 14:38:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:30,662 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-06 14:38:30,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-06 14:38:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:30,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:30,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:30,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:30,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:30,863 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2019461718, now seen corresponding path program 68 times [2021-08-06 14:38:30,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:30,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555048883] [2021-08-06 14:38:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:30,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:31,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:31,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555048883] [2021-08-06 14:38:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555048883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:31,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093693327] [2021-08-06 14:38:31,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:38:31,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:31,144 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) [2021-08-06 14:38:31,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:38:35,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:38:35,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:38:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:36,275 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 141 treesize of output 113 [2021-08-06 14:38:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:36,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093693327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:36,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:36,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:38:36,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363296540] [2021-08-06 14:38:36,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:38:36,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:38:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:38:36,643 INFO L87 Difference]: Start difference. First operand 559 states and 1806 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) [2021-08-06 14:38:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:37,511 INFO L93 Difference]: Finished difference Result 836 states and 2512 transitions. [2021-08-06 14:38:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:38:37,511 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 19 [2021-08-06 14:38:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:37,513 INFO L225 Difference]: With dead ends: 836 [2021-08-06 14:38:37,513 INFO L226 Difference]: Without dead ends: 821 [2021-08-06 14:38:37,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:38:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-08-06 14:38:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 559. [2021-08-06 14:38:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.236559139784946) internal successors, (1806), 558 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-06 14:38:37,520 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-06 14:38:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:37,520 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-06 14:38:37,520 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) [2021-08-06 14:38:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-06 14:38:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:37,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:37,521 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:37,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:37,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:37,723 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash -940432572, now seen corresponding path program 69 times [2021-08-06 14:38:37,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:37,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794143632] [2021-08-06 14:38:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:37,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:38,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:38,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794143632] [2021-08-06 14:38:38,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794143632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:38,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130864357] [2021-08-06 14:38:38,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:38:38,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:38,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:38,042 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) [2021-08-06 14:38:38,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:38:42,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:38:42,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:38:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:43,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 152 [2021-08-06 14:38:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:43,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130864357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:43,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:43,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:38:43,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943865749] [2021-08-06 14:38:43,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:43,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:43,686 INFO L87 Difference]: Start difference. First operand 559 states and 1806 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:44,801 INFO L93 Difference]: Finished difference Result 943 states and 2782 transitions. [2021-08-06 14:38:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:38:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:38:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:44,803 INFO L225 Difference]: With dead ends: 943 [2021-08-06 14:38:44,803 INFO L226 Difference]: Without dead ends: 928 [2021-08-06 14:38:44,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1113.8ms TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:38:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-08-06 14:38:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 561. [2021-08-06 14:38:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 3.2410714285714284) internal successors, (1815), 560 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1815 transitions. [2021-08-06 14:38:44,812 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1815 transitions. Word has length 19 [2021-08-06 14:38:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:44,812 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1815 transitions. [2021-08-06 14:38:44,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1815 transitions. [2021-08-06 14:38:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:44,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:44,812 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:44,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:45,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:45,013 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash 333722282, now seen corresponding path program 70 times [2021-08-06 14:38:45,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:45,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734996082] [2021-08-06 14:38:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:45,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:45,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:45,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734996082] [2021-08-06 14:38:45,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734996082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:45,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22459424] [2021-08-06 14:38:45,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:38:45,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:45,278 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) [2021-08-06 14:38:45,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:38:49,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:38:49,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:38:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:50,644 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 154 treesize of output 126 [2021-08-06 14:38:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:50,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22459424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:50,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:50,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:38:50,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119301111] [2021-08-06 14:38:50,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:50,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:50,988 INFO L87 Difference]: Start difference. First operand 561 states and 1815 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:52,241 INFO L93 Difference]: Finished difference Result 942 states and 2750 transitions. [2021-08-06 14:38:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:38:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:38:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:52,243 INFO L225 Difference]: With dead ends: 942 [2021-08-06 14:38:52,243 INFO L226 Difference]: Without dead ends: 920 [2021-08-06 14:38:52,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1319.6ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:38:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-06 14:38:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 559. [2021-08-06 14:38:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.236559139784946) internal successors, (1806), 558 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-06 14:38:52,250 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-06 14:38:52,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:52,251 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-06 14:38:52,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-06 14:38:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:52,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:52,251 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:52,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:52,452 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,SelfDestructingSolverStorable251 [2021-08-06 14:38:52,452 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:38:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1916573188, now seen corresponding path program 71 times [2021-08-06 14:38:52,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:52,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680107196] [2021-08-06 14:38:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:52,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:52,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:52,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680107196] [2021-08-06 14:38:52,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680107196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:52,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864012530] [2021-08-06 14:38:52,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:38:52,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:52,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:52,741 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) [2021-08-06 14:38:52,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:38:57,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:38:57,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:38:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:58,049 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 168 treesize of output 132 [2021-08-06 14:38:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:58,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864012530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:58,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:58,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:38:58,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292136596] [2021-08-06 14:38:58,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:58,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:58,565 INFO L87 Difference]: Start difference. First operand 559 states and 1806 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:59,910 INFO L93 Difference]: Finished difference Result 956 states and 2819 transitions. [2021-08-06 14:38:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:38:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:38:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:59,912 INFO L225 Difference]: With dead ends: 956 [2021-08-06 14:38:59,912 INFO L226 Difference]: Without dead ends: 941 [2021-08-06 14:38:59,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1325.9ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:38:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-08-06 14:38:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 564. [2021-08-06 14:38:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 3.25044404973357) internal successors, (1830), 563 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1830 transitions. [2021-08-06 14:38:59,920 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1830 transitions. Word has length 19 [2021-08-06 14:38:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:59,920 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 1830 transitions. [2021-08-06 14:38:59,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1830 transitions. [2021-08-06 14:38:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:38:59,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:59,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:59,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 14:39:00,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:00,122 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1384018488, now seen corresponding path program 72 times [2021-08-06 14:39:00,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:00,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699868792] [2021-08-06 14:39:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:00,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:00,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:00,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699868792] [2021-08-06 14:39:00,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699868792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:00,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139437915] [2021-08-06 14:39:00,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:39:00,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:00,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:00,405 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) [2021-08-06 14:39:00,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:39:05,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:39:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:39:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:39:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:05,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:39:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:06,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139437915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:06,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:06,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:39:06,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581811464] [2021-08-06 14:39:06,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:39:06,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:39:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:06,215 INFO L87 Difference]: Start difference. First operand 564 states and 1830 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:07,489 INFO L93 Difference]: Finished difference Result 916 states and 2710 transitions. [2021-08-06 14:39:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:39:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:39:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:07,491 INFO L225 Difference]: With dead ends: 916 [2021-08-06 14:39:07,491 INFO L226 Difference]: Without dead ends: 901 [2021-08-06 14:39:07,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1303.7ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:39:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-08-06 14:39:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 559. [2021-08-06 14:39:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.236559139784946) internal successors, (1806), 558 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-06 14:39:07,499 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-06 14:39:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:07,499 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-06 14:39:07,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-06 14:39:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:39:07,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:07,500 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:39:07,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 14:39:07,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:07,700 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -514267050, now seen corresponding path program 73 times [2021-08-06 14:39:07,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:07,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273539613] [2021-08-06 14:39:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:07,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:07,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:07,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273539613] [2021-08-06 14:39:07,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273539613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:07,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217585819] [2021-08-06 14:39:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:39:07,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:07,963 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) [2021-08-06 14:39:07,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:39:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:39:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:13,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 149 [2021-08-06 14:39:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:13,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217585819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:13,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:13,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:39:13,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686072766] [2021-08-06 14:39:13,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:39:13,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:39:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:39:13,930 INFO L87 Difference]: Start difference. First operand 559 states and 1806 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:14,689 INFO L93 Difference]: Finished difference Result 785 states and 2407 transitions. [2021-08-06 14:39:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:39:14,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:39:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:14,691 INFO L225 Difference]: With dead ends: 785 [2021-08-06 14:39:14,691 INFO L226 Difference]: Without dead ends: 742 [2021-08-06 14:39:14,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 819.8ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:39:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-08-06 14:39:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 568. [2021-08-06 14:39:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.2451499118165783) internal successors, (1840), 567 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1840 transitions. [2021-08-06 14:39:14,698 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1840 transitions. Word has length 19 [2021-08-06 14:39:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:14,698 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1840 transitions. [2021-08-06 14:39:14,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1840 transitions. [2021-08-06 14:39:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:39:14,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:14,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:39:14,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 14:39:14,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:14,904 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash 226630284, now seen corresponding path program 74 times [2021-08-06 14:39:14,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:14,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994403730] [2021-08-06 14:39:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:14,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:15,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:15,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994403730] [2021-08-06 14:39:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994403730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:15,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136241363] [2021-08-06 14:39:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:39:15,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:15,219 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) [2021-08-06 14:39:15,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:39:20,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:39:20,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:39:20,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:39:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:20,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-06 14:39:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:21,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136241363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:21,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:21,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:39:21,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181853597] [2021-08-06 14:39:21,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:39:21,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:39:21,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:21,428 INFO L87 Difference]: Start difference. First operand 568 states and 1840 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:23,009 INFO L93 Difference]: Finished difference Result 1049 states and 3042 transitions. [2021-08-06 14:39:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:39:23,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:39:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:23,012 INFO L225 Difference]: With dead ends: 1049 [2021-08-06 14:39:23,012 INFO L226 Difference]: Without dead ends: 1006 [2021-08-06 14:39:23,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1616.2ms TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:39:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-08-06 14:39:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 573. [2021-08-06 14:39:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.2587412587412588) internal successors, (1864), 572 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1864 transitions. [2021-08-06 14:39:23,023 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1864 transitions. Word has length 19 [2021-08-06 14:39:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:23,023 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1864 transitions. [2021-08-06 14:39:23,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1864 transitions. [2021-08-06 14:39:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:39:23,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:23,024 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:39:23,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 14:39:23,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-06 14:39:23,230 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1221005904, now seen corresponding path program 75 times [2021-08-06 14:39:23,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:23,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843947494] [2021-08-06 14:39:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:23,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:23,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:23,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843947494] [2021-08-06 14:39:23,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843947494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:23,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457825508] [2021-08-06 14:39:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:39:23,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:23,509 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) [2021-08-06 14:39:23,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:39:28,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:39:28,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:39:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:39:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:28,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:39:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:29,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457825508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:29,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:29,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:39:29,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679067251] [2021-08-06 14:39:29,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:39:29,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:29,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:39:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:29,582 INFO L87 Difference]: Start difference. First operand 573 states and 1864 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:31,099 INFO L93 Difference]: Finished difference Result 955 states and 2821 transitions. [2021-08-06 14:39:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:39:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:39:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:31,101 INFO L225 Difference]: With dead ends: 955 [2021-08-06 14:39:31,101 INFO L226 Difference]: Without dead ends: 940 [2021-08-06 14:39:31,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1514.9ms TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:39:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-08-06 14:39:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 567. [2021-08-06 14:39:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.245583038869258) internal successors, (1837), 566 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1837 transitions. [2021-08-06 14:39:31,109 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1837 transitions. Word has length 19 [2021-08-06 14:39:31,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:31,109 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1837 transitions. [2021-08-06 14:39:31,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:31,109 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1837 transitions. [2021-08-06 14:39:31,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:39:31,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:31,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:39:31,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 14:39:31,327 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,SelfDestructingSolverStorable256 [2021-08-06 14:39:31,327 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:31,328 INFO L82 PathProgramCache]: Analyzing trace with hash 130145172, now seen corresponding path program 76 times [2021-08-06 14:39:31,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:31,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16331373] [2021-08-06 14:39:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:31,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:31,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:31,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16331373] [2021-08-06 14:39:31,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16331373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:31,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983281158] [2021-08-06 14:39:31,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:39:31,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:31,654 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) [2021-08-06 14:39:31,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:39:36,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:39:36,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:39:36,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:39:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2021-08-06 14:39:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:37,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983281158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:37,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:37,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:39:37,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93238019] [2021-08-06 14:39:37,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:39:37,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:37,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:39:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:37,705 INFO L87 Difference]: Start difference. First operand 567 states and 1837 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:38,387 INFO L93 Difference]: Finished difference Result 973 states and 2943 transitions. [2021-08-06 14:39:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:39:38,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:39:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:38,389 INFO L225 Difference]: With dead ends: 973 [2021-08-06 14:39:38,389 INFO L226 Difference]: Without dead ends: 933 [2021-08-06 14:39:38,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 847.9ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:39:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-08-06 14:39:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 576. [2021-08-06 14:39:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 3.248695652173913) internal successors, (1868), 575 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1868 transitions. [2021-08-06 14:39:38,397 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1868 transitions. Word has length 19 [2021-08-06 14:39:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:38,397 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1868 transitions. [2021-08-06 14:39:38,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1868 transitions. [2021-08-06 14:39:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:39:38,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:38,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:39:38,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 14:39:38,598 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,SelfDestructingSolverStorable257 [2021-08-06 14:39:38,599 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1016676312, now seen corresponding path program 77 times [2021-08-06 14:39:38,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:38,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545811871] [2021-08-06 14:39:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:38,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:38,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:38,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545811871] [2021-08-06 14:39:38,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545811871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:38,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120441390] [2021-08-06 14:39:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:39:38,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:38,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:38,890 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) [2021-08-06 14:39:38,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:39:43,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:39:43,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:39:43,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:39:43,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:44,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2021-08-06 14:39:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:44,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120441390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:44,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:44,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:39:44,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187646590] [2021-08-06 14:39:44,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:39:44,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:39:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:44,900 INFO L87 Difference]: Start difference. First operand 576 states and 1868 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:45,632 INFO L93 Difference]: Finished difference Result 941 states and 2885 transitions. [2021-08-06 14:39:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:39:45,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:39:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:45,634 INFO L225 Difference]: With dead ends: 941 [2021-08-06 14:39:45,634 INFO L226 Difference]: Without dead ends: 926 [2021-08-06 14:39:45,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 864.7ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:39:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-08-06 14:39:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 579. [2021-08-06 14:39:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.2508650519031144) internal successors, (1879), 578 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1879 transitions. [2021-08-06 14:39:45,642 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1879 transitions. Word has length 19 [2021-08-06 14:39:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:45,642 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1879 transitions. [2021-08-06 14:39:45,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1879 transitions. [2021-08-06 14:39:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:39:45,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:45,643 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:39:45,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 14:39:45,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:45,843 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1365733514, now seen corresponding path program 78 times [2021-08-06 14:39:45,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:45,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278788564] [2021-08-06 14:39:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:45,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:46,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:46,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278788564] [2021-08-06 14:39:46,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278788564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:46,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624379289] [2021-08-06 14:39:46,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:39:46,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:46,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:46,149 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) [2021-08-06 14:39:46,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:39:51,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:39:51,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:39:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:39:51,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:51,876 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 160 treesize of output 128 [2021-08-06 14:39:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:52,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624379289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:52,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:52,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:39:52,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622802324] [2021-08-06 14:39:52,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:39:52,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:39:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:52,226 INFO L87 Difference]: Start difference. First operand 579 states and 1879 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:52,970 INFO L93 Difference]: Finished difference Result 964 states and 2955 transitions. [2021-08-06 14:39:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:39:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:39:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:52,972 INFO L225 Difference]: With dead ends: 964 [2021-08-06 14:39:52,972 INFO L226 Difference]: Without dead ends: 949 [2021-08-06 14:39:52,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:39:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-08-06 14:39:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 584. [2021-08-06 14:39:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 3.2452830188679247) internal successors, (1892), 583 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1892 transitions. [2021-08-06 14:39:52,982 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1892 transitions. Word has length 19 [2021-08-06 14:39:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:52,982 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1892 transitions. [2021-08-06 14:39:52,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1892 transitions. [2021-08-06 14:39:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:39:52,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:52,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:39:53,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:39:53,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:53,184 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:39:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -978648232, now seen corresponding path program 79 times [2021-08-06 14:39:53,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:53,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995632879] [2021-08-06 14:39:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:53,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:53,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:53,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995632879] [2021-08-06 14:39:53,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995632879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:53,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773493209] [2021-08-06 14:39:53,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:39:53,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:39:53,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:39:53,465 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) [2021-08-06 14:39:53,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:39:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:39:58,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:39:59,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 126 [2021-08-06 14:39:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:39:59,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773493209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:39:59,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:39:59,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:39:59,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791227952] [2021-08-06 14:39:59,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:39:59,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:39:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:59,748 INFO L87 Difference]: Start difference. First operand 584 states and 1892 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:01,306 INFO L93 Difference]: Finished difference Result 1097 states and 3254 transitions. [2021-08-06 14:40:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:40:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:40:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:01,308 INFO L225 Difference]: With dead ends: 1097 [2021-08-06 14:40:01,308 INFO L226 Difference]: Without dead ends: 1026 [2021-08-06 14:40:01,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1639.0ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:40:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-08-06 14:40:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 590. [2021-08-06 14:40:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.2478777589134125) internal successors, (1913), 589 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1913 transitions. [2021-08-06 14:40:01,317 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1913 transitions. Word has length 19 [2021-08-06 14:40:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:01,317 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1913 transitions. [2021-08-06 14:40:01,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1913 transitions. [2021-08-06 14:40:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:40:01,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:01,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:40:01,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 14:40:01,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-08-06 14:40:01,519 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:40:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash 185636056, now seen corresponding path program 80 times [2021-08-06 14:40:01,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:01,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051783007] [2021-08-06 14:40:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:01,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:01,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:01,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051783007] [2021-08-06 14:40:01,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051783007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:01,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674753179] [2021-08-06 14:40:01,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:40:01,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:40:01,777 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) [2021-08-06 14:40:01,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:40:07,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:40:07,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:40:07,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:40:07,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:40:08,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 126 [2021-08-06 14:40:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:08,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674753179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:08,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:40:08,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:40:08,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252063544] [2021-08-06 14:40:08,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:40:08,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:08,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:40:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:40:08,326 INFO L87 Difference]: Start difference. First operand 590 states and 1913 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:09,339 INFO L93 Difference]: Finished difference Result 1020 states and 3112 transitions. [2021-08-06 14:40:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:40:09,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:40:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:09,341 INFO L225 Difference]: With dead ends: 1020 [2021-08-06 14:40:09,341 INFO L226 Difference]: Without dead ends: 976 [2021-08-06 14:40:09,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1044.2ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:40:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-06 14:40:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 593. [2021-08-06 14:40:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2567567567567566) internal successors, (1928), 592 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1928 transitions. [2021-08-06 14:40:09,349 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1928 transitions. Word has length 19 [2021-08-06 14:40:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:09,349 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1928 transitions. [2021-08-06 14:40:09,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1928 transitions. [2021-08-06 14:40:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:40:09,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:09,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:40:09,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 14:40:09,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:09,550 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:40:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:09,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1171651860, now seen corresponding path program 81 times [2021-08-06 14:40:09,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:09,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584329891] [2021-08-06 14:40:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:09,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:09,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:09,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584329891] [2021-08-06 14:40:09,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584329891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:09,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494329476] [2021-08-06 14:40:09,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:40:09,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:40:09,869 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) [2021-08-06 14:40:09,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:40:15,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:40:15,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:40:15,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:40:15,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:40:16,054 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 186 treesize of output 150 [2021-08-06 14:40:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:16,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494329476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:16,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:40:16,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:40:16,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784139184] [2021-08-06 14:40:16,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:40:16,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:40:16,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:40:16,502 INFO L87 Difference]: Start difference. First operand 593 states and 1928 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:17,476 INFO L93 Difference]: Finished difference Result 989 states and 3024 transitions. [2021-08-06 14:40:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:40:17,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:40:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:17,478 INFO L225 Difference]: With dead ends: 989 [2021-08-06 14:40:17,478 INFO L226 Difference]: Without dead ends: 967 [2021-08-06 14:40:17,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1091.8ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:40:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-08-06 14:40:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 593. [2021-08-06 14:40:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2567567567567566) internal successors, (1928), 592 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1928 transitions. [2021-08-06 14:40:17,486 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1928 transitions. Word has length 19 [2021-08-06 14:40:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1928 transitions. [2021-08-06 14:40:17,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1928 transitions. [2021-08-06 14:40:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:40:17,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:17,487 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:40:17,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 14:40:17,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:17,688 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:40:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash -266309676, now seen corresponding path program 82 times [2021-08-06 14:40:17,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:17,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145140976] [2021-08-06 14:40:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:17,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:17,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:17,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145140976] [2021-08-06 14:40:17,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145140976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:17,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250249435] [2021-08-06 14:40:17,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:40:17,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:40:17,991 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) [2021-08-06 14:40:17,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:40:23,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:40:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:40:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:40:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:40:24,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-06 14:40:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:24,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250249435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:24,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:40:24,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:40:24,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817522625] [2021-08-06 14:40:24,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:40:24,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:40:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:40:24,789 INFO L87 Difference]: Start difference. First operand 593 states and 1928 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:26,960 INFO L93 Difference]: Finished difference Result 1110 states and 3301 transitions. [2021-08-06 14:40:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:40:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:40:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:26,962 INFO L225 Difference]: With dead ends: 1110 [2021-08-06 14:40:26,962 INFO L226 Difference]: Without dead ends: 1040 [2021-08-06 14:40:26,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2274.8ms TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:40:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-08-06 14:40:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 598. [2021-08-06 14:40:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2663316582914574) internal successors, (1950), 597 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1950 transitions. [2021-08-06 14:40:26,971 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1950 transitions. Word has length 19 [2021-08-06 14:40:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:26,971 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1950 transitions. [2021-08-06 14:40:26,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1950 transitions. [2021-08-06 14:40:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:40:26,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:26,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:40:27,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 14:40:27,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:27,172 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:40:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash 728065944, now seen corresponding path program 83 times [2021-08-06 14:40:27,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:27,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973687133] [2021-08-06 14:40:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:27,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:27,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:27,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973687133] [2021-08-06 14:40:27,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973687133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:27,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491682860] [2021-08-06 14:40:27,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:40:27,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:40:27,536 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:40:27,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:40:32,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:40:32,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:40:32,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:40:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:40:33,571 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 145 treesize of output 115 [2021-08-06 14:40:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:34,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491682860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:34,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:40:34,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:40:34,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323070482] [2021-08-06 14:40:34,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:40:34,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:40:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:40:34,079 INFO L87 Difference]: Start difference. First operand 598 states and 1950 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:35,248 INFO L93 Difference]: Finished difference Result 1024 states and 3111 transitions. [2021-08-06 14:40:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:40:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:40:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:35,250 INFO L225 Difference]: With dead ends: 1024 [2021-08-06 14:40:35,250 INFO L226 Difference]: Without dead ends: 1009 [2021-08-06 14:40:35,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1323.1ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:40:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-08-06 14:40:35,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 598. [2021-08-06 14:40:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2663316582914574) internal successors, (1950), 597 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1950 transitions. [2021-08-06 14:40:35,258 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1950 transitions. Word has length 19 [2021-08-06 14:40:35,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:35,258 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1950 transitions. [2021-08-06 14:40:35,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1950 transitions. [2021-08-06 14:40:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:40:35,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:35,259 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:40:35,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 14:40:35,459 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,SelfDestructingSolverStorable264 [2021-08-06 14:40:35,460 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:40:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:35,460 INFO L82 PathProgramCache]: Analyzing trace with hash 91810380, now seen corresponding path program 84 times [2021-08-06 14:40:35,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:35,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666056992] [2021-08-06 14:40:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:35,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:35,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:35,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666056992] [2021-08-06 14:40:35,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666056992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:35,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13479027] [2021-08-06 14:40:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:40:35,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:35,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:40:35,677 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) [2021-08-06 14:40:35,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:40:41,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:40:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:40:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:40:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:40:41,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 137 [2021-08-06 14:40:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:42,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13479027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:42,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:40:42,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:40:42,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153747074] [2021-08-06 14:40:42,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:40:42,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:40:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:40:42,322 INFO L87 Difference]: Start difference. First operand 598 states and 1950 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:42,906 INFO L93 Difference]: Finished difference Result 995 states and 3056 transitions. [2021-08-06 14:40:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:40:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:40:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:42,907 INFO L225 Difference]: With dead ends: 995 [2021-08-06 14:40:42,908 INFO L226 Difference]: Without dead ends: 980 [2021-08-06 14:40:42,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 610.3ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:40:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-08-06 14:40:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 594. [2021-08-06 14:40:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.258010118043845) internal successors, (1932), 593 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1932 transitions. [2021-08-06 14:40:42,916 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1932 transitions. Word has length 19 [2021-08-06 14:40:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:42,916 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1932 transitions. [2021-08-06 14:40:42,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1932 transitions. [2021-08-06 14:40:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:40:42,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:42,917 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:40:42,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 14:40:43,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:43,121 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:40:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1609356010, now seen corresponding path program 85 times [2021-08-06 14:40:43,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:43,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321838548] [2021-08-06 14:40:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:43,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:43,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:43,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321838548] [2021-08-06 14:40:43,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321838548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:43,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453921917] [2021-08-06 14:40:43,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:40:43,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:40:43,388 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) [2021-08-06 14:40:43,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:40:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:40:48,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:40:49,690 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 132 treesize of output 106 [2021-08-06 14:40:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:49,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453921917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:49,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:40:49,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:40:49,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116955861] [2021-08-06 14:40:49,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:40:49,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:40:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:40:49,895 INFO L87 Difference]: Start difference. First operand 594 states and 1932 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:51,603 INFO L93 Difference]: Finished difference Result 1231 states and 3818 transitions. [2021-08-06 14:40:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:40:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:40:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:51,605 INFO L225 Difference]: With dead ends: 1231 [2021-08-06 14:40:51,605 INFO L226 Difference]: Without dead ends: 1167 [2021-08-06 14:40:51,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1581.9ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:40:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-08-06 14:40:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 643. [2021-08-06 14:40:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.2616822429906542) internal successors, (2094), 642 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2094 transitions. [2021-08-06 14:40:51,615 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2094 transitions. Word has length 19 [2021-08-06 14:40:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2094 transitions. [2021-08-06 14:40:51,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2094 transitions. [2021-08-06 14:40:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:40:51,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:51,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:40:51,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 14:40:51,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:51,816 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:40:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash -525593084, now seen corresponding path program 86 times [2021-08-06 14:40:51,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:51,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52846114] [2021-08-06 14:40:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:51,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:52,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:52,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52846114] [2021-08-06 14:40:52,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52846114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:52,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942245991] [2021-08-06 14:40:52,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:40:52,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:40:52,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:40:52,169 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) [2021-08-06 14:40:52,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:40:57,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:40:57,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:40:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:40:57,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:40:58,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 146 [2021-08-06 14:40:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:40:59,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942245991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:40:59,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:40:59,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:40:59,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955970376] [2021-08-06 14:40:59,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:40:59,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:40:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:40:59,142 INFO L87 Difference]: Start difference. First operand 643 states and 2094 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:00,228 INFO L93 Difference]: Finished difference Result 1011 states and 3107 transitions. [2021-08-06 14:41:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:41:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:41:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:00,230 INFO L225 Difference]: With dead ends: 1011 [2021-08-06 14:41:00,230 INFO L226 Difference]: Without dead ends: 989 [2021-08-06 14:41:00,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1253.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:41:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-08-06 14:41:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 643. [2021-08-06 14:41:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.2616822429906542) internal successors, (2094), 642 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2094 transitions. [2021-08-06 14:41:00,239 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2094 transitions. Word has length 19 [2021-08-06 14:41:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:00,239 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2094 transitions. [2021-08-06 14:41:00,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2094 transitions. [2021-08-06 14:41:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:41:00,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:00,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:41:00,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 14:41:00,440 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,SelfDestructingSolverStorable267 [2021-08-06 14:41:00,441 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:41:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1963554620, now seen corresponding path program 87 times [2021-08-06 14:41:00,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:00,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548032843] [2021-08-06 14:41:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:00,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:00,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:00,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548032843] [2021-08-06 14:41:00,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548032843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:00,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053901479] [2021-08-06 14:41:00,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:41:00,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:41:00,859 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) [2021-08-06 14:41:00,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:41:06,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:41:06,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:41:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:41:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:41:07,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-06 14:41:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:07,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053901479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:07,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:41:07,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:41:07,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395008599] [2021-08-06 14:41:07,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:41:07,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:41:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:41:07,718 INFO L87 Difference]: Start difference. First operand 643 states and 2094 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:09,972 INFO L93 Difference]: Finished difference Result 1330 states and 3948 transitions. [2021-08-06 14:41:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:41:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:41:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:09,975 INFO L225 Difference]: With dead ends: 1330 [2021-08-06 14:41:09,975 INFO L226 Difference]: Without dead ends: 1253 [2021-08-06 14:41:09,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2212.2ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:41:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-08-06 14:41:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 656. [2021-08-06 14:41:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 3.300763358778626) internal successors, (2162), 655 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2162 transitions. [2021-08-06 14:41:09,985 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2162 transitions. Word has length 19 [2021-08-06 14:41:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:09,985 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 2162 transitions. [2021-08-06 14:41:09,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2162 transitions. [2021-08-06 14:41:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:41:09,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:09,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:41:10,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 14:41:10,186 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,SelfDestructingSolverStorable268 [2021-08-06 14:41:10,187 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:41:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash -979929316, now seen corresponding path program 88 times [2021-08-06 14:41:10,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:10,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524382264] [2021-08-06 14:41:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:10,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:10,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:10,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524382264] [2021-08-06 14:41:10,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524382264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:10,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335477603] [2021-08-06 14:41:10,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:41:10,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:10,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:41:10,495 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) [2021-08-06 14:41:10,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:41:16,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:41:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:41:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:41:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:41:16,894 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 166 treesize of output 132 [2021-08-06 14:41:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:17,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335477603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:17,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:41:17,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:41:17,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69091679] [2021-08-06 14:41:17,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:41:17,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:41:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:41:17,672 INFO L87 Difference]: Start difference. First operand 656 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:20,364 INFO L93 Difference]: Finished difference Result 1192 states and 3579 transitions. [2021-08-06 14:41:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:41:20,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 19 [2021-08-06 14:41:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:20,367 INFO L225 Difference]: With dead ends: 1192 [2021-08-06 14:41:20,367 INFO L226 Difference]: Without dead ends: 1144 [2021-08-06 14:41:20,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2753.9ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:41:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-08-06 14:41:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 658. [2021-08-06 14:41:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.2983257229832574) internal successors, (2167), 657 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2167 transitions. [2021-08-06 14:41:20,376 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2167 transitions. Word has length 19 [2021-08-06 14:41:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:20,377 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2167 transitions. [2021-08-06 14:41:20,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2167 transitions. [2021-08-06 14:41:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:41:20,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:20,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:41:20,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 14:41:20,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:20,578 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:41:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:20,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1234459856, now seen corresponding path program 89 times [2021-08-06 14:41:20,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:20,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755834280] [2021-08-06 14:41:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:20,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:20,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:20,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755834280] [2021-08-06 14:41:20,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755834280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:20,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475690557] [2021-08-06 14:41:20,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:41:20,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:41:20,837 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) [2021-08-06 14:41:20,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:41:26,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:41:26,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:41:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:41:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:41:27,456 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 159 treesize of output 129 [2021-08-06 14:41:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:27,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475690557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:27,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:41:27,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:41:27,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135871989] [2021-08-06 14:41:27,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:41:27,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:41:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:41:27,766 INFO L87 Difference]: Start difference. First operand 658 states and 2167 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:29,220 INFO L93 Difference]: Finished difference Result 1233 states and 3738 transitions. [2021-08-06 14:41:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:41:29,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:41:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:29,223 INFO L225 Difference]: With dead ends: 1233 [2021-08-06 14:41:29,223 INFO L226 Difference]: Without dead ends: 1156 [2021-08-06 14:41:29,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1359.4ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:41:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-08-06 14:41:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 656. [2021-08-06 14:41:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 3.2916030534351144) internal successors, (2156), 655 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2156 transitions. [2021-08-06 14:41:29,232 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2156 transitions. Word has length 19 [2021-08-06 14:41:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:29,232 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 2156 transitions. [2021-08-06 14:41:29,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2156 transitions. [2021-08-06 14:41:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:41:29,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:29,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:41:29,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 14:41:29,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:29,433 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:41:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash -17426618, now seen corresponding path program 90 times [2021-08-06 14:41:29,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:29,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951636713] [2021-08-06 14:41:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:29,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:29,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:29,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951636713] [2021-08-06 14:41:29,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951636713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:29,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717251418] [2021-08-06 14:41:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:41:29,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:41:29,749 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) [2021-08-06 14:41:29,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:41:35,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:41:35,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:41:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:41:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:41:36,049 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 160 treesize of output 128 [2021-08-06 14:41:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:36,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717251418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:36,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:41:36,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:41:36,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118585202] [2021-08-06 14:41:36,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:41:36,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:41:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:41:36,674 INFO L87 Difference]: Start difference. First operand 656 states and 2156 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:41:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:37,646 INFO L93 Difference]: Finished difference Result 1087 states and 3309 transitions. [2021-08-06 14:41:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:41:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 19 [2021-08-06 14:41:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:37,648 INFO L225 Difference]: With dead ends: 1087 [2021-08-06 14:41:37,648 INFO L226 Difference]: Without dead ends: 1072 [2021-08-06 14:41:37,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1039.5ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:41:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-08-06 14:41:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 660. [2021-08-06 14:41:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.2959028831562973) internal successors, (2172), 659 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2172 transitions. [2021-08-06 14:41:37,658 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2172 transitions. Word has length 19 [2021-08-06 14:41:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:37,658 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2172 transitions. [2021-08-06 14:41:37,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-08-06 14:41:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2172 transitions. [2021-08-06 14:41:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:41:37,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:37,659 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:41:37,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 14:41:37,859 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,SelfDestructingSolverStorable271 [2021-08-06 14:41:37,859 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:41:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:37,860 INFO L82 PathProgramCache]: Analyzing trace with hash -487333554, now seen corresponding path program 91 times [2021-08-06 14:41:37,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:37,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178157251] [2021-08-06 14:41:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:37,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:38,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:38,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178157251] [2021-08-06 14:41:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178157251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:38,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125369441] [2021-08-06 14:41:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:41:38,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:41:38,236 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) [2021-08-06 14:41:38,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:41:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:41:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:41:44,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-06 14:41:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:45,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125369441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:45,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:41:45,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:41:45,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689704250] [2021-08-06 14:41:45,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:41:45,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:41:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:41:45,538 INFO L87 Difference]: Start difference. First operand 660 states and 2172 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:48,375 INFO L93 Difference]: Finished difference Result 1282 states and 3768 transitions. [2021-08-06 14:41:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:41:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 19 [2021-08-06 14:41:48,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:48,378 INFO L225 Difference]: With dead ends: 1282 [2021-08-06 14:41:48,378 INFO L226 Difference]: Without dead ends: 1219 [2021-08-06 14:41:48,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2924.6ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:41:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-08-06 14:41:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 659. [2021-08-06 14:41:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.291793313069909) internal successors, (2166), 658 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2166 transitions. [2021-08-06 14:41:48,388 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2166 transitions. Word has length 19 [2021-08-06 14:41:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:48,388 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 2166 transitions. [2021-08-06 14:41:48,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2166 transitions. [2021-08-06 14:41:48,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:41:48,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:48,389 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:41:48,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 14:41:48,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:48,589 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:41:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:48,590 INFO L82 PathProgramCache]: Analyzing trace with hash 580445510, now seen corresponding path program 92 times [2021-08-06 14:41:48,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:48,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969827388] [2021-08-06 14:41:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:48,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:48,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:48,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969827388] [2021-08-06 14:41:48,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969827388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:48,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395083869] [2021-08-06 14:41:48,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:41:48,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:48,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:41:48,792 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) [2021-08-06 14:41:48,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:41:54,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:41:54,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:41:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:41:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:41:55,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:41:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:55,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395083869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:55,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:41:55,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-06 14:41:55,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235137194] [2021-08-06 14:41:55,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:41:55,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:41:55,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:41:55,790 INFO L87 Difference]: Start difference. First operand 659 states and 2166 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) [2021-08-06 14:41:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:56,850 INFO L93 Difference]: Finished difference Result 1048 states and 3216 transitions. [2021-08-06 14:41:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:41:56,851 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 19 [2021-08-06 14:41:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:56,852 INFO L225 Difference]: With dead ends: 1048 [2021-08-06 14:41:56,852 INFO L226 Difference]: Without dead ends: 994 [2021-08-06 14:41:56,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1116.4ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:41:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-08-06 14:41:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 652. [2021-08-06 14:41:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 3.273425499231951) internal successors, (2131), 651 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2131 transitions. [2021-08-06 14:41:56,861 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2131 transitions. Word has length 19 [2021-08-06 14:41:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:56,861 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 2131 transitions. [2021-08-06 14:41:56,861 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) [2021-08-06 14:41:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2131 transitions. [2021-08-06 14:41:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:41:56,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:56,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:41:56,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 14:41:57,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:57,062 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:41:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:57,063 INFO L82 PathProgramCache]: Analyzing trace with hash -199447666, now seen corresponding path program 93 times [2021-08-06 14:41:57,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:57,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674735079] [2021-08-06 14:41:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:57,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:41:57,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:57,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674735079] [2021-08-06 14:41:57,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674735079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:41:57,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216023373] [2021-08-06 14:41:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:41:57,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:41:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:41:57,287 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) [2021-08-06 14:41:57,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:42:03,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:42:03,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:42:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:42:03,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:42:03,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-06 14:42:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:04,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216023373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:04,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:42:04,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:42:04,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023903091] [2021-08-06 14:42:04,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:42:04,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:04,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:42:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:42:04,143 INFO L87 Difference]: Start difference. First operand 652 states and 2131 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:04,625 INFO L93 Difference]: Finished difference Result 861 states and 2704 transitions. [2021-08-06 14:42:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:42:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:42:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:04,626 INFO L225 Difference]: With dead ends: 861 [2021-08-06 14:42:04,626 INFO L226 Difference]: Without dead ends: 846 [2021-08-06 14:42:04,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:42:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-06 14:42:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 660. [2021-08-06 14:42:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.2792109256449167) internal successors, (2161), 659 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2161 transitions. [2021-08-06 14:42:04,634 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2161 transitions. Word has length 19 [2021-08-06 14:42:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:04,634 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2161 transitions. [2021-08-06 14:42:04,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2161 transitions. [2021-08-06 14:42:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:42:04,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:04,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:42:04,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 14:42:04,835 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,SelfDestructingSolverStorable274 [2021-08-06 14:42:04,836 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:42:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash -548504868, now seen corresponding path program 94 times [2021-08-06 14:42:04,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:04,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456793358] [2021-08-06 14:42:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:04,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:05,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:05,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456793358] [2021-08-06 14:42:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456793358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:05,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203661372] [2021-08-06 14:42:05,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:42:05,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:05,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:42:05,108 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) [2021-08-06 14:42:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:42:11,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:42:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:42:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:42:11,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:42:11,789 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 176 treesize of output 140 [2021-08-06 14:42:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203661372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:12,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:42:12,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:42:12,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334424303] [2021-08-06 14:42:12,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:42:12,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:42:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:42:12,180 INFO L87 Difference]: Start difference. First operand 660 states and 2161 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:12,910 INFO L93 Difference]: Finished difference Result 976 states and 2959 transitions. [2021-08-06 14:42:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:42:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:42:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:12,912 INFO L225 Difference]: With dead ends: 976 [2021-08-06 14:42:12,912 INFO L226 Difference]: Without dead ends: 918 [2021-08-06 14:42:12,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:42:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-08-06 14:42:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 657. [2021-08-06 14:42:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.277439024390244) internal successors, (2150), 656 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2150 transitions. [2021-08-06 14:42:12,920 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2150 transitions. Word has length 19 [2021-08-06 14:42:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:12,920 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 2150 transitions. [2021-08-06 14:42:12,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2150 transitions. [2021-08-06 14:42:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:42:12,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:12,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:42:12,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 14:42:13,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:13,122 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:42:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:13,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1600291668, now seen corresponding path program 95 times [2021-08-06 14:42:13,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:13,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881535495] [2021-08-06 14:42:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:13,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:13,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:13,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881535495] [2021-08-06 14:42:13,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881535495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:13,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195046781] [2021-08-06 14:42:13,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:42:13,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:13,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:42:13,423 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) [2021-08-06 14:42:13,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:42:19,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:42:19,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:42:19,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:42:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:42:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-06 14:42:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:20,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195046781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:20,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:42:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:42:20,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328901331] [2021-08-06 14:42:20,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:42:20,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:42:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:42:20,351 INFO L87 Difference]: Start difference. First operand 657 states and 2150 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:20,765 INFO L93 Difference]: Finished difference Result 843 states and 2660 transitions. [2021-08-06 14:42:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:42:20,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:42:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:20,766 INFO L225 Difference]: With dead ends: 843 [2021-08-06 14:42:20,766 INFO L226 Difference]: Without dead ends: 828 [2021-08-06 14:42:20,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:42:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-08-06 14:42:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 654. [2021-08-06 14:42:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.2802450229709037) internal successors, (2142), 653 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2142 transitions. [2021-08-06 14:42:20,774 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2142 transitions. Word has length 19 [2021-08-06 14:42:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:20,774 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 2142 transitions. [2021-08-06 14:42:20,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2142 transitions. [2021-08-06 14:42:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:42:20,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:20,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:42:20,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 14:42:20,976 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,SelfDestructingSolverStorable276 [2021-08-06 14:42:20,976 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:42:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1293533208, now seen corresponding path program 96 times [2021-08-06 14:42:20,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:20,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119011133] [2021-08-06 14:42:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:20,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:21,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:21,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119011133] [2021-08-06 14:42:21,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119011133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:21,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835672951] [2021-08-06 14:42:21,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:42:21,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:21,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:42:21,265 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) [2021-08-06 14:42:21,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:42:27,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:42:27,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:42:27,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:42:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:42:28,154 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 134 treesize of output 108 [2021-08-06 14:42:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:28,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835672951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:28,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:42:28,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:42:28,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410126703] [2021-08-06 14:42:28,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:42:28,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:42:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:42:28,380 INFO L87 Difference]: Start difference. First operand 654 states and 2142 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:28,866 INFO L93 Difference]: Finished difference Result 878 states and 2755 transitions. [2021-08-06 14:42:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:42:28,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:42:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:28,868 INFO L225 Difference]: With dead ends: 878 [2021-08-06 14:42:28,868 INFO L226 Difference]: Without dead ends: 863 [2021-08-06 14:42:28,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:42:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-08-06 14:42:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 660. [2021-08-06 14:42:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.289833080424886) internal successors, (2168), 659 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2168 transitions. [2021-08-06 14:42:28,876 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2168 transitions. Word has length 19 [2021-08-06 14:42:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:28,876 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2168 transitions. [2021-08-06 14:42:28,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2168 transitions. [2021-08-06 14:42:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:42:28,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:28,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:42:28,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 14:42:29,078 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,SelfDestructingSolverStorable277 [2021-08-06 14:42:29,079 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:42:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash 944476006, now seen corresponding path program 97 times [2021-08-06 14:42:29,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:29,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737398025] [2021-08-06 14:42:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:29,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:29,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:29,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737398025] [2021-08-06 14:42:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737398025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:29,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471370630] [2021-08-06 14:42:29,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:42:29,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:29,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:42:29,359 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) [2021-08-06 14:42:29,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:42:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:35,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:42:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:42:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-06 14:42:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:36,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471370630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:36,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:42:36,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:42:36,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761416688] [2021-08-06 14:42:36,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:42:36,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:42:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:42:36,820 INFO L87 Difference]: Start difference. First operand 660 states and 2168 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:37,730 INFO L93 Difference]: Finished difference Result 1018 states and 3066 transitions. [2021-08-06 14:42:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:42:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:42:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:37,732 INFO L225 Difference]: With dead ends: 1018 [2021-08-06 14:42:37,732 INFO L226 Difference]: Without dead ends: 975 [2021-08-06 14:42:37,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 973.7ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:42:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-08-06 14:42:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 660. [2021-08-06 14:42:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.289833080424886) internal successors, (2168), 659 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2168 transitions. [2021-08-06 14:42:37,741 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2168 transitions. Word has length 19 [2021-08-06 14:42:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:37,741 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2168 transitions. [2021-08-06 14:42:37,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2168 transitions. [2021-08-06 14:42:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:42:37,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:37,742 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:42:37,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 14:42:37,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-06 14:42:37,943 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:42:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2015418284, now seen corresponding path program 98 times [2021-08-06 14:42:37,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:37,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560549952] [2021-08-06 14:42:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:37,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:38,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:38,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560549952] [2021-08-06 14:42:38,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560549952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:38,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334493366] [2021-08-06 14:42:38,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:42:38,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:38,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:42:38,223 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) [2021-08-06 14:42:38,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:42:44,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:42:44,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:42:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:42:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:42:45,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 132 [2021-08-06 14:42:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:45,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334493366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:45,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:42:45,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:42:45,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162903446] [2021-08-06 14:42:45,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:42:45,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:42:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:42:45,707 INFO L87 Difference]: Start difference. First operand 660 states and 2168 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:46,660 INFO L93 Difference]: Finished difference Result 1104 states and 3303 transitions. [2021-08-06 14:42:46,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:42:46,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:42:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:46,663 INFO L225 Difference]: With dead ends: 1104 [2021-08-06 14:42:46,663 INFO L226 Difference]: Without dead ends: 1089 [2021-08-06 14:42:46,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:42:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-06 14:42:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 662. [2021-08-06 14:42:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.293494704992436) internal successors, (2177), 661 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2177 transitions. [2021-08-06 14:42:46,673 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2177 transitions. Word has length 19 [2021-08-06 14:42:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:46,673 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2177 transitions. [2021-08-06 14:42:46,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2177 transitions. [2021-08-06 14:42:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:42:46,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:46,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:42:46,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 14:42:46,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-08-06 14:42:46,877 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:42:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash -741263430, now seen corresponding path program 99 times [2021-08-06 14:42:46,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:46,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335272222] [2021-08-06 14:42:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:46,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:47,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:47,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335272222] [2021-08-06 14:42:47,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335272222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:47,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691542422] [2021-08-06 14:42:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:42:47,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:47,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:42:47,189 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) [2021-08-06 14:42:47,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:42:53,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:42:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:42:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:42:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:42:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 137 [2021-08-06 14:42:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:54,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691542422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:54,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:42:54,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:42:54,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134400943] [2021-08-06 14:42:54,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:42:54,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:42:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:42:54,776 INFO L87 Difference]: Start difference. First operand 662 states and 2177 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:55,781 INFO L93 Difference]: Finished difference Result 1080 states and 3255 transitions. [2021-08-06 14:42:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:42:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:42:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:55,783 INFO L225 Difference]: With dead ends: 1080 [2021-08-06 14:42:55,783 INFO L226 Difference]: Without dead ends: 1065 [2021-08-06 14:42:55,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 994.5ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:42:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-08-06 14:42:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 658. [2021-08-06 14:42:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.286149162861492) internal successors, (2159), 657 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2159 transitions. [2021-08-06 14:42:55,792 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2159 transitions. Word has length 19 [2021-08-06 14:42:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:55,792 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2159 transitions. [2021-08-06 14:42:55,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2159 transitions. [2021-08-06 14:42:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:42:55,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:55,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:42:55,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 14:42:55,994 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,SelfDestructingSolverStorable280 [2021-08-06 14:42:55,994 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:42:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 841587476, now seen corresponding path program 100 times [2021-08-06 14:42:55,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:55,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375759119] [2021-08-06 14:42:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:55,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:42:56,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:56,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375759119] [2021-08-06 14:42:56,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375759119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:42:56,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547666152] [2021-08-06 14:42:56,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:42:56,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:42:56,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:42:56,308 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) [2021-08-06 14:42:56,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:43:02,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:43:02,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:43:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:43:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:43:03,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 122 [2021-08-06 14:43:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:43:04,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547666152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:43:04,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:43:04,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:43:04,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417302804] [2021-08-06 14:43:04,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:43:04,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:43:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:43:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:43:04,021 INFO L87 Difference]: Start difference. First operand 658 states and 2159 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:05,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:43:05,074 INFO L93 Difference]: Finished difference Result 1014 states and 3082 transitions. [2021-08-06 14:43:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:43:05,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:43:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:43:05,076 INFO L225 Difference]: With dead ends: 1014 [2021-08-06 14:43:05,076 INFO L226 Difference]: Without dead ends: 986 [2021-08-06 14:43:05,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1100.1ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:43:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-08-06 14:43:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 663. [2021-08-06 14:43:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 3.297583081570997) internal successors, (2183), 662 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 2183 transitions. [2021-08-06 14:43:05,085 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 2183 transitions. Word has length 19 [2021-08-06 14:43:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:43:05,085 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 2183 transitions. [2021-08-06 14:43:05,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 2183 transitions. [2021-08-06 14:43:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:43:05,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:43:05,086 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:43:05,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 14:43:05,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-08-06 14:43:05,287 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:43:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:43:05,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1835963096, now seen corresponding path program 101 times [2021-08-06 14:43:05,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:43:05,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513517244] [2021-08-06 14:43:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:43:05,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:43:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:43:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:43:05,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:43:05,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513517244] [2021-08-06 14:43:05,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513517244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:43:05,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239345983] [2021-08-06 14:43:05,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:43:05,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:43:05,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:43:05,567 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) [2021-08-06 14:43:05,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:43:12,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:43:12,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:43:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:43:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:43:12,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2021-08-06 14:43:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:43:13,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239345983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:43:13,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:43:13,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:43:13,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891027521] [2021-08-06 14:43:13,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:43:13,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:43:13,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:43:13,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:43:13,302 INFO L87 Difference]: Start difference. First operand 663 states and 2183 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:43:13,976 INFO L93 Difference]: Finished difference Result 1009 states and 3067 transitions. [2021-08-06 14:43:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:43:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 19 [2021-08-06 14:43:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:43:13,978 INFO L225 Difference]: With dead ends: 1009 [2021-08-06 14:43:13,978 INFO L226 Difference]: Without dead ends: 994 [2021-08-06 14:43:13,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:43:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-08-06 14:43:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 658. [2021-08-06 14:43:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.286149162861492) internal successors, (2159), 657 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2159 transitions. [2021-08-06 14:43:13,987 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2159 transitions. Word has length 19 [2021-08-06 14:43:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:43:13,987 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2159 transitions. [2021-08-06 14:43:13,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2159 transitions. [2021-08-06 14:43:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:43:13,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:43:13,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:43:14,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 14:43:14,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:43:14,188 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:43:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:43:14,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1589252762, now seen corresponding path program 102 times [2021-08-06 14:43:14,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:43:14,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044556381] [2021-08-06 14:43:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:43:14,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:43:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:43:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:43:14,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:43:14,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044556381] [2021-08-06 14:43:14,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044556381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:43:14,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929722472] [2021-08-06 14:43:14,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:43:14,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:43:14,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:43:14,480 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) [2021-08-06 14:43:14,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:43:21,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:43:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:43:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:43:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:43:21,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 136 [2021-08-06 14:43:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:43:22,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929722472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:43:22,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:43:22,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:43:22,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41380179] [2021-08-06 14:43:22,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:43:22,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:43:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:43:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:43:22,200 INFO L87 Difference]: Start difference. First operand 658 states and 2159 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:43:23,672 INFO L93 Difference]: Finished difference Result 1206 states and 3547 transitions. [2021-08-06 14:43:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:43:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 19 [2021-08-06 14:43:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:43:23,674 INFO L225 Difference]: With dead ends: 1206 [2021-08-06 14:43:23,674 INFO L226 Difference]: Without dead ends: 1128 [2021-08-06 14:43:23,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1394.8ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:43:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-08-06 14:43:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 674. [2021-08-06 14:43:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2986627043090637) internal successors, (2220), 673 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2220 transitions. [2021-08-06 14:43:23,684 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2220 transitions. Word has length 19 [2021-08-06 14:43:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:43:23,684 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 2220 transitions. [2021-08-06 14:43:23,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2220 transitions. [2021-08-06 14:43:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:43:23,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:43:23,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:43:23,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 14:43:23,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:43:23,886 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:43:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:43:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash -848355428, now seen corresponding path program 103 times [2021-08-06 14:43:23,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:43:23,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778809628] [2021-08-06 14:43:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:43:23,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:43:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:43:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:43:24,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:43:24,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778809628] [2021-08-06 14:43:24,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778809628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:43:24,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892230404] [2021-08-06 14:43:24,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:43:24,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:43:24,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:43:24,164 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) [2021-08-06 14:43:24,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:43:25,452 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:43:25,452 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 [2021-08-06 14:43:26,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:43:26,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 14:43:26,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-06 14:43:26,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:43:26,658 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 1,while executing Executor. [2021-08-06 14:43:26,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:43:26,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:43:26,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 14:43:26,663 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:43:26,663 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:43:26,664 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:43:26 BasicIcfg [2021-08-06 14:43:26,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:43:26,665 INFO L168 Benchmark]: Toolchain (without parser) took 689546.13 ms. Allocated memory was 217.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 198.3 MB in the beginning and 629.5 MB in the end (delta: -431.1 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-06 14:43:26,665 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 217.1 MB. Free memory was 199.7 MB in the beginning and 199.7 MB in the end (delta: 85.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:43:26,665 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.54 ms. Allocated memory is still 217.1 MB. Free memory was 198.3 MB in the beginning and 196.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:43:26,665 INFO L168 Benchmark]: Boogie Preprocessor took 31.61 ms. Allocated memory is still 217.1 MB. Free memory was 196.7 MB in the beginning and 195.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:43:26,665 INFO L168 Benchmark]: RCFGBuilder took 519.06 ms. Allocated memory is still 217.1 MB. Free memory was 195.6 MB in the beginning and 201.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-08-06 14:43:26,665 INFO L168 Benchmark]: TraceAbstraction took 688961.42 ms. Allocated memory was 217.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 200.2 MB in the beginning and 629.5 MB in the end (delta: -429.3 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-06 14:43:26,666 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 0.14 ms. Allocated memory is still 217.1 MB. Free memory was 199.7 MB in the beginning and 199.7 MB in the end (delta: 85.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.54 ms. Allocated memory is still 217.1 MB. Free memory was 198.3 MB in the beginning and 196.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.61 ms. Allocated memory is still 217.1 MB. Free memory was 196.7 MB in the beginning and 195.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 519.06 ms. Allocated memory is still 217.1 MB. Free memory was 195.6 MB in the beginning and 201.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 688961.42 ms. Allocated memory was 217.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 200.2 MB in the beginning and 629.5 MB in the end (delta: -429.3 MB). Peak memory consumption was 1.6 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: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 108]: 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 20 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 107]: 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 20 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 104]: 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 20 with TraceHistMax 1,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 688849.8ms, OverallIterations: 285, TraceHistogramMax: 1, EmptinessCheckTime: 186.9ms, AutomataDifference: 139635.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 49.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12708 SDtfs, 28085 SDslu, 61210 SDs, 0 SdLazy, 70887 SolverSat, 2944 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31481.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6509 GetRequests, 2152 SyntacticMatches, 85 SemanticMatches, 4272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10930 ImplicationChecksByTransitivity, 137577.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=674occurred in iteration=284, InterpolantAutomatonStates: 2679, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1708.5ms AutomataMinimizationTime, 284 MinimizatonAttempts, 66206 StatesRemovedByMinimization, 284 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 786.0ms SsaConstructionTime, 2436.0ms SatisfiabilityAnalysisTime, 151309.2ms InterpolantComputationTime, 7466 NumberOfCodeBlocks, 7461 NumberOfCodeBlocksAsserted, 497 NumberOfCheckSat, 7061 ConstructedInterpolants, 0 QuantifiedInterpolants, 99075 SizeOfPredicates, 1533 NumberOfNonLiveVariables, 9450 ConjunctsInSsa, 3437 ConjunctsInUnsatCore, 405 InterpolantComputations, 172 PerfectInterpolantSequences, 146/581 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